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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 5653. Отображено 100.
01-11-2012 дата публикации

Method for qualifying a non-particulate ion-exchanger adsorber

Номер: US20120276652A1
Принадлежит: SARTORIUS STEDIM BIOTECH GMBH

The present invention relates to a method for the validation of a non-particulate ion exchange adsorber and a kit for the validation of a non-particulate ion exchange adsorber.

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28-02-2013 дата публикации

Aseptic connection of separation or reaction systems

Номер: US20130048111A1
Автор: Klaus Gebauer
Принадлежит: GE Healthcare Bio Sciences AB

A separation or reaction unit ( 1; 1′; 81; 81′; 101 ) and a method for aseptically connecting such units. The separation or reaction unit ( 1; 1′; 81; 81′; 101 ) comprises at last one fluid inlet ( 3 a, 3 b, 5 a, 5 b; 3 a′, 3 b′, 5 a′, 5 b ′; 85 a, 85 b; 103 a, 103 b ) and at least one fluid outlet ( 3 a, 3 b, 5 a, 5 b; 3 a′, 3 b′, 5 a′, 5 b′; 85 a, 85 b; 103 a, 103 b ). At least one of the inlet or outlet is sealed by at least one film ( 7, 9; 11; 87 a, 87 b; 107 a, 107 b ) and the contact surface between the film and the separation or reaction unit is aseptic. The films are adapted to be mated with a corresponding film on another separation or reaction unit or on a fluid distribution unit ( 20; 57; 61 ) which the separation or reaction unit possibly should be connected with and said mated films are adapted to be pulled out together two and two after mating such that corresponding fluid inlets/outlets on the two connected units are mated aseptically.

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21-03-2013 дата публикации

Sample detection method by thin-layer chromatography, thin-layer chromatography plate, and method for producing same

Номер: US20130067996A1
Принадлежит: Daicel Corp

The present invention provides a thin-layer chromatography plate and a thin-layer chromatography that can detect the separation of a component in a sample by a separating agent layer that does not permit the detection of the separation of the component in the sample by an optical response. For a sample that has an optical response to ultraviolet light or a coloring agent, the present invention uses a thin-layer chromatography plate that has a first separating agent layer, which has the same optical response as the sample, and a second separating agent layer, which is disposed adjacent thereto and has an optical response that is different from the aforementioned optical response; carries out development of the sample in the first separating agent layer; thereafter carries out further development of the spots from the first separating agent layer toward the second separating agent layer; and detects the spots in the second separating agent layer through exposure to ultraviolet radiation or a color-development treatment with a coloring agent. In addition, the development axis in the first separating agent layer is maintained approximately perpendicular, and spot broadening at the boundary surface is prevented by adjusting the binder blending ratio.

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21-03-2013 дата публикации

General Mass Spectrometry Assay Using Continuously Eluting Co-Fractionating Reporters of Mass Spectrometry Detection Efficiency

Номер: US20130068943A1
Автор: Heaven Michael R.
Принадлежит: THE UAB RESEARCH FOUNDATION

The invention provides general methods for quantifying any conceivable compound including small organic molecules and biological molecules in mass spectrometric measurements. The methods include the use of chemical or biological reporters such as artificial polypeptides containing proteolytic cleavage sites, which provide proteolytic reporter peptides for standardization of mass spectrometric detection efficiency. In addition to mass spectrometry standardization between different samples, the artificial polypeptides also standardize sample preparation amongst different samples undergoing mass spectrometric analysis when using electrophoresis separation prior to mass spectrometric analysis. Methods of the present invention also include methods for designing artificial polypeptides with peak to peak continuous liquid chromatography elution profiles spanning the complete or partial analyte elution profile for organic and biological molecules. Also included are the artificial polypeptides predigested with protease, which is compatible for use in experiments with native PAGE, in-solution proteolytic digestion of polypeptides, and small organic molecules undergoing fractionation separation followed by mass spectrometric evaluation. 1. A method for characterizing an analyte in a sample , said methods comprising:(a) combining, a plurality of reporters with the sample containing the analyte to create a mixture, wherein each reporter generates a distinct reporter peak, the plurality of reporters provide a continuous set of reporter peaks during at least a fraction of the elution range of the sample and the plurality of reporters are not present in the sample or are not predicted to be created from the sample during processing of the sample;(b) subjecting the mixture to fractionation by liquid chromatography to produce an eluate;(c) subjecting the eluate to detection by a mass spectrometric technique to generate a mass spectrometric signal from the analyte and at least one ...

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18-04-2013 дата публикации

Sugar analysis device and analysis method

Номер: US20130095570A1
Автор: Tetsuo Yokoyama
Принадлежит: JCR Pharmaceuticals Co Ltd

Disclosed is a method separation analysis of reducing sugars with enhanced sensitivity and an analytical apparatus therefore employing the post-column fluorescence detection/boric acid complex anion exchange method. The method disclosed is a method for analysis of reducing sugars using the post-column fluorescence detection/boric acid complex anion exchange method, and characterized in that a back-pressure generator is installed in the flow path between the heater, which is for causing a reaction by heating a sample separated by column chromatography with a basic amino acid, and a fluorometric detector.

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18-04-2013 дата публикации

The method for quick and simultaneous determination of 16 inorganic anions and organic acids in tobacco

Номер: US20130095571A1

The present invention discloses a method for quick and simultaneous determination of 16 inorganic anions and organic acids in tobacco by ion chromatography The retention behavior of inorganic anions and organic acids on the anion exchange column was investigated using potassium hydroxide produced by EGC-II KOH eluent autogenerator as eluent. The optimized gradient elution condition was obtained. The samples were prepared through extraction, filtration and dilution before analysis. The separation was performed on an anion exchange column. The time of the gradient elution program was 50 mins. Under the optimized conditions, the calibration of peak area for all the analytes were linear in the ranges of 10 5 . The method in the present invention has the advantadges of simplicity, rapidity and accuracy, and is able to simultaneously determine 16 inorganic anions and organic acids in tobacco by one single time of injection.

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30-05-2013 дата публикации

Rapid nucleic acid purification

Номер: US20130137107A1
Принадлежит: Nanohelix Co Ltd

Provided is a method for rapid nucleic acid purification, and the method for rapid nucleic acid isolation according to the present invention is very useful in diagnosing causes of disease or detecting a target gene; can be used in molecular diagnosis of causes of disease more rapidly and conveniently, as compared with the existing nucleic acid isolation method requiring complicated and special equipment; does not require skills therefor, thereby allowing an ordinary person to personally conduct isolation of nucleic acid for analyzing causes of disease and further solving the existing inconvenience caused by directly going to the hospitals or health clinical centers; and can analyze causes of disease more promptly.

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08-08-2013 дата публикации

Procedure for Structural Characterization of a Recombinant Polyclonal Protein or a Polyclonal Cell Line

Номер: US20130203063A1
Принадлежит: SYMPHOGEN A/S

The present invention provides a structural characterization platform that can be used to assess the stability of a polyclonal cell line during production, as well as batch-to-batch consistency of the final polyclonal products. The structural characterization platform is based on genetic analyses as well as protein characterization techniques that alone or in combination provides the necessary information to characterize the polyclonal cell line and final products. The collection of different homologous proteins to be analyzed with the platform techniques is for example a recombinant polyclonal antibody or a mixture of monoclonal antibodies. 1. A method for characterizing a sample comprising a recombinant polyclonal antibody comprising individual antibodies having different variable regions , said method comprising:analyzing aliquots of said sample by at least one protein characterization technique selected from chromatographic analyses which separate proteins according to a physico-chemical property other than size, such that information related to the relative proportion or presence of individual antibody members of said sample is obtained,wherein said sample is derived from a cell culture supernatant from a polyclonal cell culture producing said recombinant polyclonal antibody and wherein the polyclonal cell culture comprises individual clones each expressing a different individual member of the recombinant polyclonal antibody.2. The method of claim 1 , comprising at least one individual chromatographic analysis based on a physico-chemical property selected from i) net charge claim 1 , ii) hydrophobicity claim 1 , iii) isoelectric point claim 1 , and iv) affinity.3. The method of claim 1 , further comprising at least one protein characterization technique selected from i) analysis of proteolytic digestions of the individual antibodies claim 1 , ii) “bulk” N-terminal sequencing claim 1 , and iii) analysis using specific detector molecules for the individual ...

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29-08-2013 дата публикации

Electronic control of ph and ionic strength

Номер: US20130220830A1

Apparatuses and methods for controlling ionic strength and/or pH of a solution are provided.

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12-09-2013 дата публикации

ULTRATHIN-LAYER CHROMATOGRAPHY PLATES COMPRISING ELECTROSPUN FIBERS AND METHODS OF MAKING AND USING THE SAME

Номер: US20130233780A1
Принадлежит:

An ultrathin-layer chromatography plate including a stationary phase comprising electrospun nanofibers wherein at least about 50% of the nanofibers are oriented within 20° of a direction of alignment, and wherein the stationary phase has a thickness from about 10 μm to about 30 μm. 1. An ultrathin-layer chromatography plate including a stationary phase comprising electrospun nanofibers wherein at least about 50% of the nanofibers are oriented within 20° of a direction of alignment , and wherein the stationary phase has a thickness from about 10 μm to about 30 μm.2. The ultrathin-layer chromatography plate of claim 1 , wherein the nanofibers comprise a polymer selected from the group consisting of polyacrylonitrile claim 1 , polyvinyl alcohol claim 1 , polyacrylamide claim 1 , poly(methyl methacrylate) claim 1 , polyethylene oxide claim 1 , polyvinylpyrrolidone claim 1 , sodium polystyrene sulfonate claim 1 , polyhydroxyalkanoate claim 1 , polystyrene claim 1 , SU-8 photoresist claim 1 , nylon claim 1 , and combinations thereof.3. The ultrathin-layer chromatography plate of claim 1 , wherein the nanofibers have an average diameter from about 250 nm to about 750 nm.4. The ultrathin-layer chromatography plate of claim 1 , wherein the nanofibers have an average diameter from about 300 nm to about 500 nm.5. The ultrathin-layer chromatography plate of having an average effective pore radius from about 1.00 μm to about 2.00 μm.6. The ultrathin-layer chromatography plate of having a mobile phase velocity constant along the direction of alignment of at least one of the following:{'sup': 2', '−1, 'greater than about 0.150 cmsfor heptane as mobile phase;'}{'sup': 2', '−1, 'greater than about 0.050 cmsfor a 50:50 mixture of acetone and water as mobile phase; and'}{'sup': 2', '−1, 'greater than about 0.150 cmsfor acetone as mobile phase.'}7. The ultrathin-layer chromatography plate of claim 1 , wherein the stationary phase has a length and a width claim 1 , and the thickness of ...

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12-09-2013 дата публикации

ULTRATHIN-LAYER CHROMATOGRAPHY PLATES COMPRISING ELECTROSPUN NANOFIBERS COMPRISING SILICA AND METHODS OF MAKING AND USING THE SAME

Номер: US20130233781A1
Автор: Newsome Toni, Olesik Susan
Принадлежит:

An ultrathin-layer chromatography plate having a stationary phase with electrospun nanofibers comprising silica, wherein the stationary phase has a thickness from about 10 μm to about 30 μm. 1. An ultrathin-layer chromatography plate comprising a stationary phase including electrospun nanofibers comprising silica , wherein the stationary phase has a thickness from about 10 μm to about 30 μm.2. The ultrathin-layer chromatography plate of claim 1 , wherein the nanofibers comprise at least about 90% silica.3. The ultrathin-layer chromatography plate of claim 1 , wherein the nanofibers comprise at least about 95% silica.4. The ultrathin-layer chromatography plate of claim 1 , wherein the nanofibers further comprise polyvinylpyrrolidone.5. The ultrathin-layer chromatography plate of claim 1 , wherein the nanofibers have an average diameter from about 200 nm to about 750 nm.6. The ultrathin-layer chromatography plate of claim 1 , wherein the nanofibers have an average diameter from about 300 nm to about 500 nm.7. The ultrathin-layer chromatography plate of claim 1 , wherein the stationary phase has a length and a width claim 1 , and the thickness of the stationary phase is substantially consistent along its entire length and width.8. A method of making an ultrathin-layer chromatography plate having a stationary phase comprising nanofibers comprising silica claim 1 , the method comprising:electrospinning a solution comprising polyvinylpyrrolidone and silica nanoparticles to form a mat comprising polyvinylpyrrolidone-silica composite nanofibers; andheat treating the mat to form the stationary phase.9. The method of claim 8 , wherein the composite nanofibers have an average diameter from about 200 nm to about 1 μm.10. The method of claim 8 , wherein the mat has a thickness from about 30 μm to about 150 μm.11. The method of claim 8 , wherein the stationary phase has a thickness from about 10 μm to about 30 μm.12. The method of claim 8 , wherein the nanofibers comprise at ...

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03-10-2013 дата публикации

ION CHROMATOGRAPHY SYSTEMS WITH FLOW-DELAY ELUENT RECYCLE

Номер: US20130259750A1
Принадлежит:

A chromatographic method including chromatographically separating sample ionic species in an eluent stream, detecting the separated sample ionic species, catalytically combining hydrogen and oxygen gases or catalytically decomposing hydrogen peroxide in a catalytic gas elimination chamber, and recycling the effluent stream from the chamber to the chromatography separation column. The residence time between the detector and the chamber is at least about one minute. Also, flowing the recycle sequentially through two detector effluent flow channels of an electrolytic membrane suppressor. Also, applying heat or UV energy between the detector and the chamber. Also, detecting bubbles after the chamber. Also, a Platinum group metal catalyst and ion exchange medium in the chamber. Apparatus for performing the methods. 1. A catalytic gas and ionic species removal device comprising:a) a liquid flow-through housing;b) a platinum group metal catalyst for catalytically combining hydrogen and oxygen gases, or for catalytically decomposing hydrogen peroxide, or both, disposed in the housing; andc) a flow-through ion exchange medium disposed in the housing.2. The device of in which the platinum group metal is selected from the group consisting of platinum claim 1 , palladium claim 1 , or a mixture thereof.3. The device of in which the platinum group metal is palladium.4. The device of in which the catalyst comprises a mixture of platinum and palladium.5. The device of in which the ion exchange medium comprises a bed of ion exchange packing.6. The device of in which the ion exchange medium comprises an ion exchange monolith.7. The device of in which the platinum group metal is irreversibly bound as a coating to the surface of the ion exchange medium.8. The device of in which the coating is bound electrostatically to the ion exchange medium.9. The device of in which the coated ion exchange medium has excess ion exchange capacity for ion exchange with ions in a flowing liquid stream. ...

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21-11-2013 дата публикации

POLYMER FOR FILLER FOR PREPROCESSING COLUMN

Номер: US20130309775A1
Принадлежит:

It is a subject of the present invention to provide a novel polymer; a filler for measuring a perfluoro compound having an acidic group at terminal which comprises said polymer; a column filled with said filler; and a measuring method for a perfluoro compound having an acidic group at terminal by using said column; as well as a filler for measuring a drug comprising the above-described polymer; a column filled with said filler; and a measuring method for a drug by using said column. 2. The method of claim 1 , further comprising eluting at least a portion of the perfluoro compound with an eluting solution having a pH of 8 to 14.3. The method of claim 2 , further comprising subjecting an eluted portion of the perfluoro compound to mass spectrometry.4. The method of claim 2 , further comprising claim 2 , prior to eluting claim 2 , contacting at least a portion the perfluoro compound with a washing solution having a pH of 8 or less.5. The method of claim 1 , wherein the compound of formula [1] is provided in a molar ratio of 60/40 to 90/10 relative to the compound of formula [2].6. The method of claim 1 , wherein the prepolymer is formed by mixing the compound of formula [1] with the compound of formula [2] in a non-aqueous claim 1 , organic solution to form an organic mixture.7. The method of claim 6 , further comprising thereafter adding the organic mixture to an aqueous solution to form a suspension polymerization mixture.8. The method of claim 7 , further comprising subjecting the suspension polymerization mixture to an elevated temperature of 60 to 90 degrees Celsius.9. The method of claim 8 , wherein the suspension polymerization mixture is subjected to the elevated temperature for 4 to 20 hours.10. The method of claim 1 , wherein the polymer is formed by attaching to the prepolymer at least one of a secondary amino group claim 1 , a tertiary amino group and a quaternary amino group as the anion exchanging group.11. The method of claim 1 , wherein the polymer is ...

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05-12-2013 дата публикации

High purity chromatographic materials comprising an ionizable modifier

Номер: US20130319086A1
Принадлежит: Waters Technologies Corp

The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are high purity chromatographic materials comprising a chromatographic surface wherein the chromatographic surface comprises a hydrophobic surface group and one or more ionizable modifier.

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12-12-2013 дата публикации

ELUENT FOR ION-EXCHANGE CHROMATOGRAPHY, AND METHOD OF ANALYZING NUCLEIC ACID CHAINS

Номер: US20130330735A1
Принадлежит: SEKISUI MEDICAL CO., LTD.

The present invention provides eluent for ion-exchange chromatography, wherein the eluent allows separation and detection of a target nucleic acid such as a PCR-amplified product, a restriction enzyme fragment of the PCR-amplified product, or a restriction enzyme fragment of a nucleic acid in a short time with high separation performance. The present invention also provides a method of analyzing nucleic acid chains by ion-exchange chromatography using the eluent. The present invention provides an eluent for ion-exchange chromatography comprising a guanidine salt derived from guanidine represented by the following formula (1): 2. The eluent for ion-exchange chromatography according to claim 1 , wherein the guanidine salt is guanidine hydrochloride or guanidine sulfate.3. A method of analyzing nucleic acid chains claim 1 , which comprises using the eluent for ion-exchange chromatography according to .4. A method of analyzing nucleic acid chains claim 2 , which comprises using the eluent for ion-exchange chromatography according to . The present invention relates to an eluent for ion-exchange chromatography for use in separation and detection of a target nucleic acid such as a PCR-amplified product, a restriction enzyme fragment of the PCR-amplified product, or a restriction enzyme fragment of a nucleic acid. The present invention also relates to a method of analyzing nucleic acid chains by ion-exchange chromatography using the eluent.Ion-exchange chromatography is a method of separating a target analyte by utilizing electrostatic interactions between ions in the target analyte and ion-exchange groups in column packing.Ion-exchange chromatography is particularly excellent in separation of biomacromolecules such as nucleic acids, proteins, and polysaccharides, and thus has been used in the fields of biochemistry, medicine, and the like.Ion-exchange chromatography is categorized into anion-exchange chromatography and cation-exchange chromatography. Anion-exchange ...

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19-12-2013 дата публикации

Plate-Type Column, Temperature Regulation System and Gas Chromatograph System

Номер: US20130333444A1
Принадлежит: SHIMADZU CORPORATION

Provided is a plate-type column which allows the temperature of its inner passage to be rapidly increased or decreased while ensuring the correctness of an analysis or other operations. A plate-type column includes: a plate-shaped main body projecting portions and protruding from a circumferential edge of the main body and a fluid-flow passage extending in the main body and the projecting portions and An intermediate portion of the passage is provided in the main body while each of the end portions of the passage extends from the main body through the projecting portion or with each of the end portions being open to the outside at the tip of the projecting portion or 1. A plate-type column , comprising:a) a plate-shaped main body;b) a projecting portion protruding from a circumferential edge of the main body; andc) a fluid-flow passage extending in the main body and the projecting portion,wherein an intermediate portion of the passage is provided in the main body, while end portions of the passage extend from the main body through the projecting portion, with each of the end portions being open to an outside at a tip of the projecting portion, thus allowing the main body and the projecting portion to individually and independently undergo a temperature regulation.2. The plate-type column according to claim 1 , wherein two or more projecting portions are provided for the main body claim 1 , and each of the end portions of the passage is extended through a different projecting portion.3. The plate-type column according to claim 1 , wherein both the main body and the projecting portion are formed on a same member claim 1 , with a portion of this member being cut off to form the projecting portion.4. The plate-type column according to claim 1 , wherein a stationary phase for gas chromatography is supported on an inner wall of the passage.5. A temperature regulation system for regulating a temperature of the plate-type column including: a plate-shaped main body; a ...

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02-01-2014 дата публикации

LARGE CAPACITY ACID OR BASE GENERATOR AND METHOD OF USE

Номер: US20140004001A1
Принадлежит:

Method and apparatus for generating an acid or base, e.g. for chromatographic analysis of anions. For generating a base the method includes the steps of providing a cation source in a cation source reservoir, flowing an aqueous liquid stream through a base generation chamber separated from the cation source reservoir by a barrier (e.g. a charged membrane) substantially preventing liquid flow while providing a cation transport bridge, applying an electric potential between an anode cation source reservoir and a cathode in the base generation chamber to electrolytically generate hydroxide ions therein and to cause cations in the cation source reservoir to electromigrate and to be transported across the barrier toward the cathode to combine with the transported cations to form cation hydroxide, and removing the cation hydroxide in an aqueous liquid stream as an effluent from the first base generation chamber. Suitable cation sources include a salt solution, a cation hydroxide solution or cation exchange resin. 1. An eluent generator for generating an acid or a base comprising:(a) an ion source reservoir;(b) a remote reservoir for holding a solution comprising one of a cation-containing solution or an anion-containing solution, the remote reservoir supplying the solution to the ion source reservoir;(c) an acid or base generation chamber having an inlet port and an outlet port, the outlet port of the acid or base generation chamber configured to be fluidically coupled to an inlet of a chromatographic separator;(d) a charged first barrier disposed between the ion source reservoir and the acid or base generation chamber, the barrier substantially preventing liquid flow while providing an ion transport bridge for only ions of one charge, positive or negative;(e) a first electrode in electrical communication with the ion source reservoir;(f) a second electrode in electrical communication with the first acid or base generation chamber; and(g) an aqueous liquid source in fluid ...

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09-01-2014 дата публикации

METHOD AND KIT FOR ANALYZING SAMPLES

Номер: US20140011284A1
Принадлежит: BIOMOTIF AB

The present invention relates to a method tor enriching and/or separating and/or immobilizing an analyte of interest comprising bringing an analyte of interest into contact with a derivatizing agent; incubating said analyte with said derivatizing agent, thereby incorporating a sulphonic acid group or as analogue thereof into the molecular structure of mo analyte of interest; bringing the analyte of interest into contact with a molecularly imprinted polymer with selective affinity foe a sulphonic acid group or an analogue thereof; and enriching and/or separating and/or immobilizing the analyte of interest by nee of the molecularly imprinted polymer. Further disclosed is a kit comprising a derivatizing agent, which contains a sulphonic group or an analogue thereof and a reactive group for creating a covalent bond between said derivatizing agent nod an analyte of interest, and a molecularly imprinted polymer with selective affinity for a sulphonic acid group or an analogue thereof. 1. A method for enriching and/or separating and/or immobilizing an analyte of interest comprising:bringing an analyte of interest into contact with a derivatizing agent; incubating said analyte with said derivatizing agent, thereby incorporating a sulphonic acid group or an analogue thereof into the molecular structure of the analyte of interest;bringing the analyte of interest into contact with a molecularly imprinted polymer with selective affinity for a sulphonic acid group or an analogue thereof; andenriching and/or separating and/or immobilizing the analyte of interest by use of the molecularly imprinted polymer.2. A method according to wherein said derivatizing agent contains the sulphonic group or an analogue thereof and a reactive group for creating a covalent bond between said derivatizing agent and said analyte of interest.3. A method according to wherein said derivatizing agent has the formula RSOH or consists of a salt thereof claim 1 , where Ris an organic compound comprising an ...

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23-01-2014 дата публикации

METHODS FOR RECOVERING AND ANALYZING AMINES

Номер: US20140024127A1
Принадлежит: KABUSHIKI KAISHA TOSHIBA

The objects of embodiments in the present disclosure are to provide a method capable of recovering two or more amine compounds at the same time from a gas or solution, and also to provide a method capable of analyzing the recovered amines. 1. A method for recovering an amine contained in a gas or in a solution , comprising:the step (A), in which said gas or solution is brought into contact with a solid adsorbent so that said solid adsorbent may retain the amine; andthe step (B), in which the amine retained by said solid adsorbent in the step (A) is eluted out by use of a basic compound-containing organic solvent;{'sub': '3', 'wherein said solid adsorbent has a substituent group represented by —SOM in which M is H or an alkali metal.'}2. The method according to for recovering an amine claim 1 , wherein said solid adsorbent has a substituent group represented by —R—SOMin whichM is H or an alkali metal, and{'sup': '2', 'sub': 2', 'r', '6', '4', 's', '2', 't', '6', '4', 'u', '2', 'v, '—R— is a substituent group represented by —(CH)—, —(CH)— or —(CH)—(CH)—(CH)—,'}provided that n, r, s, t, u and v are integers satisfying the conditions of: 5≦r≦24, 1≦s≦3, 0≦t≦24, 0≦u≦3, 0≦v≦24 and 2≦(t+u+v).3. The method according to for recovering an amine claim 1 , wherein said solid adsorbent has a substituent group represented by —(CH)—CH—SOH or —Si(CH)—CH—CH—SOH in which w is an integer satisfying the condition of 4≦w≦1000.4. The method according to for recovering an amine claim 1 , wherein said basic compound-containing organic solvent is methanol containing ammonia in an amount of 0.5 to 10 wt % inclusive.5. The method according to for recovering an amine claim 1 , wherein said basic compound-containing organic solvent further contains water or an aqueous solution containing an acid in an amount of 5 wt % or less.6. The method according for recovering an amine claim 1 , wherein said solid adsorbent is in the form of an ion-exchange column.7. The method according to for recovering an ...

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27-03-2014 дата публикации

ELECTROLYTIC ELUENT RECYCLE DEVICE, APPARATUS AND METHOD OF USE

Номер: US20140083854A1
Автор: Riviello John M.
Принадлежит: Dionex Corporation

Electrolytic eluent recycle systems for ion chromatography using a multi-channel electrolytic ion exchange device which integrates suppression, eluent generation, and eluent recycle. The systems recycle the eluent into the analytical system without passing the eluent through the electrode chambers. Also, such systems with a channel for electrolytic removal of ions from the suppression effluent before recycle. 1. An ion chromatography method using an integrated suppressor and eluent generator apparatus for ion chromatography comprising a suppressor chamber comprising ion exchange material and including an inlet and an outlet , a first electrode chamber comprising a first electrode and including an inlet and an outlet , a second electrode chamber comprising a second electrode and including an inlet and an outlet , an eluent generator chamber comprising flow-through ion exchange material and including an inlet and an outlet , a first barrier preventing significant liquid flow , but permitting transport of ions of only one charge , positive or negative , disposed between said eluent generator chamber and said second electrode chamber , a second barrier preventing significant liquid flow , but permitting transport of ions of only one charge , positive or negative , disposed between said suppressor chamber and said eluent generator chamber , and a third barrier preventing significant liquid flow , but permitting transport of ions of only one charge , positive or negative , disposed between said first electrode chamber and said suppressor chamber , said method comprising(a) flowing an eluent stream comprising separated ionic species of one charge, positive or negative, through said suppression chamber to suppress said eluent,(b) recycling said suppressed eluent from said suppressor chamber, directly or indirectly, to said eluent generator chamber,(c) passing a current between said first and second electrodes through said suppressor chamber and eluent generator chamber ...

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27-03-2014 дата публикации

METHOD, AN APPARATUS, AND A COMPUTER PROGRAM PRODUCT FOR IDENTIFYING METABOLITES FROM LIQUID CHROMATOGRAPHY-MASS SPECTROMETRY MEASUREMENTS

Номер: US20140088885A1
Автор: LEE Dong-Yup
Принадлежит:

The present invention relates to a method for identifying metabolites present in a set of samples. The method may include: (a) forming a plurality of peak-groups, wherein each peak-group comprises mass peaks representative of a specific ion in each chromatographic run; (b) forming a plurality of clusters, wherein each cluster comprises at least one peak-group of (a) each having similar chromatographic profiles; and (c) generating a list of metabolite predictions, wherein each metabolite prediction is selected from the plurality of clusters of (b). 1. A method for identifying metabolites present in a set of samples , the method comprising:(a) forming a plurality of peak-groups, wherein each peak-group comprises mass peaks representative of a specific ion in each chromatographic run;(b) forming a plurality of clusters, wherein each cluster comprises at least one peak-group of (a) each having similar chromatographic profiles; and(c) generating a list of metabolite predictions, wherein each metabolite prediction is selected from the plurality of clusters of (b),wherein forming the plurality of peak-groups comprises:(i) sorting the mass peaks in accordance with their respective RT;(ii) selecting a slice window having a slice width, wherein the slice width is selected to cover a range of RT;(iii) moving the slice window across the sorted mass peaks, wherein the start of the slice window is positioned at a first ungrouped mass peak within the slice window, wherein the first ungrouped mass peak is selected to be a target peak;(iv) sorting within the slice window the mass peaks in accordance with their respective mass-charge ratio (m/z); and(v) grouping together mass peaks having m/z values close to that of the target peak.2. The method of claim 1 , further comprising generating a list of mass peaks prior to forming the plurality of peak-groups of (a).3. The method of claim 2 , wherein the list of mass peaks comprises data selected from the group consisting of mass-to-charge ...

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27-01-2022 дата публикации

ION GENERATION USING MODIFIED WETTED POROUS MATERIALS

Номер: US20220028674A1
Принадлежит:

The invention generally relates to ion generation using modified wetted porous materials. In certain aspects, the invention generally relates to systems and methods for ion generation using a wetted porous substrate that substantially prevents diffusion of sample into the substrate. In other aspects, the invention generally relate to ion generation using a wetted porous material and a drying agent. In other aspects, the invention generally relates to ion generation using a modified wetted porous substrate in which at least a portion of the porous substrate includes a material that modifies an interaction between a sample and the substrate. 190-. (canceled)91. A method for analyzing a sample , the method comprising:providing a cartridge configured to hold at least a portion of a porous substrate within a body of the cartridge, and an electrode incorporated into the body of the cartridge such that when the porous substrate is disposed within the cartridge, the electrode connects to the porous substrate;loading a sample onto the porous substrate;activating the electrode once the electrode is in contact with the porous substrate to thereby generate ions of the sample; andanalyzing the ions of the sample.92. The method according to claim 91 , wherein analyzing comprising use of a mass spectrometer and the cartridge is positioned with respect to an inlet of the mass spectrometer so that a tip of the porous substrate is aligned with the inlet of the mass spectrometer.93. The method according to claim 91 , wherein the cartridge further comprises the porous substrate.94. The method according to claim 93 , wherein the porous substrate is paper.95. The method according to claim 94 , wherein the paper is filter paper.96. The method according to claim 93 , wherein the porous substrate is wetted.97. The method according to claim 93 , wherein the porous substrate comprises a sample prior to the porous substrate being loaded into the cartridge.98. The method according to claim 93 , ...

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03-02-2022 дата публикации

MARKER PEPTIDE OF SNAKE VENOM THROMBIN-LIKE ENZYMES (SVTLES) FROM AGKISTRODON HALYS PALLAS AND APPLICATION THEREOF

Номер: US20220034856A1
Принадлежит:

The present invention relates to the field of chemical analysis detection and application, in particular to a marker peptide of snake venom thrombin-like enzymes (SVTLEs) from and an application thereof. The amino acid sequence of the marker peptide of snake venom thrombin-like enzymes (SVTLEs) from is TLCAGVMEGGIDTCNR. Characterizing the source of species and a content of the SVTLEs in a to-be-detected sample by using the marker peptide includes the following steps of: pretreating the to-be-detected sample by trypsin through enzymolysis, and taking a supernatant of an enzymolysis liquid as a test solution; and injecting the test solution and a reference solution into a liquid chromatography-mass spectrometer, and selecting a qualitative ion pair and a quantitative ion pair for detecting the source of species and a content of the SVTLEs in the to-be-detected sample. 1Agkistrodon Halys Pallas. A marker peptide of snake venom thrombin-like enzymes (SVTLEs) from , wherein an amino acid sequence of the marker peptide is TLCAGVMEGGIDTCNR.2. A method for detecting a source of species and/or a content of the SVTLEs in a to-be-detected sample by using the marker peptide according to claim 1 , comprising the following steps of:(1) pretreating the to-be-detected sample by trypsin through enzymolysis, and taking a supernatant of an enzymolysis liquid as a test solution;{'i': 'Agkistrodon Halys Pallas', '(2) pretreating a reference substance of the marker peptide of snake venom from by the trypsin through enzymolysis, and preparing a series of reference solutions with different concentrations;'}{'sub': '18', '(3) injecting the test solution in the step (1) and the reference solution in the step (2) into a liquid chromatography-mass spectrometer, conducting multiple-reaction monitoring by employing an electrospray positive ion mode with double charges 877.4→550.2 (in mass to charge (m/z) ratio) as a qualitative ion pair and double charges 877.4→892.4 as a quantitative ion pair, ...

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19-01-2017 дата публикации

ELECTRO-SPUN FIBERS AND APPLICATIONS THEREOF

Номер: US20170016144A1
Принадлежит:

A supported nanofiber medium useful for segregating chemical species is provided by selecting a polymer, selecting a substrate; and electrospinning the polymer to form a nanofiber medium on the supporting substrate. When the substrate is a planar surface, the nanofiber medium will be a mat suitable for conducting chromatographic separation. When the substrate is a filament, the nanofiber medium is an annular mat suitable for solid phase microextraction. The nanofiber media formed may be selectively cross-linked and at least partially carbonized to carbon nanofibers. The nanofiber medium is supported on the substrate without the use of binder material. 1. A method for analytically separating at least two chemical species , comprising the steps of:providing a separation medium, comprising a mat of nanofibers disposed on a surface of a substrate;providing at least two chemical species, mixed together in an appropriate solvent; andseparating the at least two chemical species from each other through contact of the mixture with the separation medium.2. The method of claim 1 , wherein:the separating step is achieved by ultrathin layer chromatography (UTLC);the substrate surface is planar and the mat of nanofibers on the planar surface has a thickness in the range of from about 11.5 to about 17.4 microns and has an average fiber diameter in the range of from about 150 to about 400 nm, such that the separation medium is a UTLC stationary phase; andthe mixture of the at least two chemical species in the appropriate solvent is a UTLC mobile phase.3. The method of claim 2 , wherein: placing the UTLC mobile phase onto the UTLC stationary phase; and', 'drawing the UTLC mobile phase upward by capillary action., 'the ultra-thin chromatography separating step is achieved by the steps of4. The method of claim 1 , wherein: placing the UTLC mobile phase onto the UTLC stationary phase; and', 'drawing the UTLC mobile phase upward by capillary action., 'the ultra-thin chromatography ...

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21-01-2021 дата публикации

FUNCTIONALIZED POLYOLEFIN CAPILLARIES FOR OPEN TUBULAR ION CHROMATOGRAPHY

Номер: US20210016266A1
Принадлежит:

Open tubular capillary columns for liquid and ion chromatography, based upon an ionically impermeable polyolefin capillary having a bore with a sulfonate-group- or amine-group-functionalized internal surface. The capillary columns may include a coating of ion exchanging nanoparticles electrostatically bound to the functionalized internal surface. The capillary columns may be made by exposing the interior surface to a sulfonating reagent comprising chlorosulfonic acid (CISOH), preferably from 85 wt % to 95 wt % chlorosulfonic acid at a process temperature of 20 to 25° C. The interior surface may be subsequently exposed to an asymmetrical diamine to form a sulfonic mid-linkage to the diamine, i.e., to form a sulfonamide-linked, amine-group-functionalized internal surface. The coating may be provided by subsequently exposing the interior surface to an aqueous suspension of ion exchanging nanoparticles to electrostatically bond the ion exchanging nanoparticles to the functionalized internal surface. 1. An open tubular capillary column for liquid and ion chromatography , the column comprising:an ionically impermeable capillary of a polyolefin material;{'sub': '3', 'the capillary having a bore with an internal surface that has been exposed to a sulfonating reagent comprising chlorosulfonic acid (ClSOH) to sulfonate the polyolefin material to a sulfonated polyolefin material, wherein, after exposure to the sulfonating reagent, the internal surface has been exposed to an asymmetrical diamine aminating agent to form a sulfonamide-linked, amine-group-functionalized internal surface.'}2. The open tubular capillary column of claim 1 , wherein the aminating reagent comprised N—N-dimethylethylenediamine.3. The open tubular capillary column of claim 1 , wherein claim 1 , after exposure to the aminating agent claim 1 , the internal surface has been exposed to a methylating agent to form a sulfonamide-linked claim 1 , quaternary-amine-group-functionalized internal surface.4. The ...

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18-01-2018 дата публикации

ION GENERATION USING MODIFIED WETTED POROUS MATERIALS

Номер: US20180017535A1
Принадлежит:

The invention generally relates to ion generation using modified wetted porous materials. In certain aspects, the invention generally relates to systems and methods for ion generation using a wetted porous substrate that substantially prevents diffusion of sample into the substrate. In other aspects, the invention generally relate to ion generation using a wetted porous material and a drying agent. In other aspects, the invention generally relates to ion generation using a modified wetted porous substrate in which at least a portion of the porous substrate includes a material that modifies an interaction between a sample and the substrate. 190-. (canceled)91. A sample analysis system comprising:a cartridge comprising a porous substrate that tapers to a tip and an electrode connected to the porous substrate; anda mass spectrometer.92. The system according to claim 91 , wherein the cartridge is configured such that the tip of the porous substrate does not extend beyond an end of the cartridge.93. The system according to claim 91 , wherein the cartridge further comprises a bottom portion and a detachable cover claim 91 , and the cartridge is configured such that the bottom portion is configured to hold the porous substrate.94. The system according to claim 93 , wherein the cartridge is configured such that voltage is not supplied to the porous material in the cartridge until the detachable cover is connected to the bottom portion.95. The system according to claim 93 , wherein the cartridge further comprises a solvent port.96. The system according to claim 95 , wherein the solvent port is configured for continuous supply of solvent to the porous substrate.97. The system according to claim 95 , wherein the solvent port is configured for supply of only a discrete amount of solvent to the porous substrate such that porous substrate is discrete from a flow of solvent.98. The system according to claim 91 , wherein the system is configured such that the cartridge is ...

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16-01-2020 дата публикации

QUANTITATIVE HPTLC CANNABINOID FIELD TESTING DEVICE AND METHOD

Номер: US20200018734A1
Автор: Stitzlein Kathleen
Принадлежит:

A field testing device is provided for quantitating components of marijuana such as THC, THC-A, CBD, CBDA, and/or CBN. Quantitation may be made, e.g. from biological fluids such as saliva, or from plant extracts. A device according to the invention may include an HPTLC plate for spatially separating interferents and analytes, and may also include fluorometric components for quantitating analytes. The device may include a microprocessor adapted to relate fluorescent intensity to analyte concentration through one or more calibration curves. Devices may optionally include microfluidics for carrying out HPTLC on biological samples including sample reservoirs, reagent reservoirs, micro-pumps, mixers, and the like. 1. A cannabinoid quantitation device , comprising: a sample receptacle adapted to receive a volume of liquid sample;', 'a micropump having an intake in fluid communication with the sample receptacle;', 'a development chamber adapted to contain a thin layer chromatography mobile phase;', 'a stationary phase disposed within the development chamber and suitable for conducting thin layer chromatography;', 'a sample deposit area of the stationary phase in fluid communication with an output of the micropump;', 'a mobile phase reservoir adapted to contain a thin layer chromatography mobile phase; and', 'a casing combining, into the form of a cartridge, the sample receptacle, the micropump, the development chamber, the stationary phase, the sample deposit area, and the mobile phase reservoir;, 'a cartridge includingan excitation source emitting light suitable for measurably exciting electrons in a cannabinoid UV absorption band, the excitation source being in optical communication with a stationary phase of the cartridge, wherein the excitation source comprises an ultraviolet light emitting diode having operably sufficient spectral output between 310 nm and 390 nm to quantitate the cannabinoid;an emission detection component operatively sensitive to cannabinoid ...

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26-01-2017 дата публикации

Paper Based Diagnostic Test

Номер: US20170023556A1

The present invention relates to simple, low-cost, rapid paper-based diagnostic devices and their methods of use. 1. A diagnostic device comprising:a substrate having pores, wherein said substrate further comprises an agglutination zone; anda sample deposited on said agglutination zone, wherein said sample is comprised of a mixture of whole blood and a solution of a Hb solubility assay.2. The diagnostic device of wherein said sample is comprised of a volume of whole blood and a volume of Hb solubility assay mixed claim 1 , respectively claim 1 , in a 1:20 ratio by volume.3. The diagnostic device of further comprising a hydrophobic barrier surrounding said substrate.4. The diagnostic device of wherein said hydrophobic barrier is wax.5. The diagnostic device of wherein said substrate is chromatography paper.6. The diagnostic device of wherein said pores of said substrate are in the range of about 2-200 μm in diameter.7. The diagnostic device of wherein said hydrophobic barrier is square shaped.8. The diagnostic device of further comprising a plurality of alignment lines wherein each of said plurality of alignment lines is located within each of the corners of said square shaped hydrophobic barrier.9. The diagnostic device of wherein said substrate further comprises a thickness and said wax permeates said thickness of said substrate.10. A diagnostic device comprising:a substrate having pores, wherein said substrate further comprises an agglutination zone; anda sample deposited on said agglutination zone, wherein said sample is comprised of a mixture of whole blood and a solution, said solution comprising a chemically lysing agent, a reducing agent, and a concentrated phosphate buffer.11. The diagnostic device of wherein said sample is comprised of a volume of said whole blood and a volume of said solution mixed claim 10 , respectively claim 10 , in a 1:20 ratio by volume.12. The diagnostic device of wherein said substrate further comprises a hydrophobic barrier ...

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25-01-2018 дата публикации

Automated method of calibrating a chromatography system and analysis of a sample

Номер: US20180024101A1
Принадлежит: Dionex Corp

An automated method of calibrating a chromatography system and analyzing a sample is described. The method includes forming diluted standard solutions that are injected into a chromatography column. The detected peaks can be identified based on a first predetermined calibration ratio associated with the standard solution. Once the chromatography system is calibrated, samples can be chromatographically analyzed where the measured peaks are identified and quantified in an automated manner.

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24-01-2019 дата публикации

DIP-STICK WESTERN BLOT

Номер: US20190025250A1
Автор: Strong William
Принадлежит:

Methods, kits, and systems are provided for separating, immobilizing, and/or detecting analytes of one or more samples using dipsticks. A ‘dipstick’ is an object that can be embedded and subsequently removed from a separation medium, and to which analytes can be immobilized while the object is embedded in the separation medium. Examples of separation media include an electrophoresis gel of any format and a stationary phase for column chromatography. Embodiments of the present methods include applying a sample to a separation medium; separating analytes of the sample in the separation medium along a separation axis; immobilizing the analytes on a dipstick embedded in the separation medium; removing the dipstick from the separation medium; and detecting the analytes immobilized on the removed dipstick. 1. A method of separating and detecting analytes of a sample , the method comprising:applying a sample to a fluid separation medium, wherein the fluid separation medium comprises polyacrylamide or dextran;separating analytes of the sample in the separation medium to generate a distribution of the analytes along a separation axis;immobilizing the analytes on a dipstick embedded in part of the separation medium in which analytes become distributed such that the dipstick or an elongated portion thereof is aligned parallel to the separation axis, wherein distribution of analytes immobilized on the dipstick preserves the distribution of analytes as occurred in the separation medium, wherein the dipstick is embedded before the separating;removing the dipstick from the separation medium; anddetecting the analytes immobilized on the removed dipstick,wherein separating analytes of the sample comprises performing electrophoresis, electroosmosis, or isoelectric focusing.2. The method of claim 1 , wherein the fluid separation medium comprises polyacrylamide.3. The method of claim 2 , wherein the fluid separation medium comprises N claim 2 ,N-polydimethylacrylamide.4. The method of ...

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23-01-2020 дата публикации

MICROTUBE

Номер: US20200025731A1
Автор: ASOGAWA Minoru
Принадлежит: NEC Corporation

A microtube comprises a sample receptor, a lid and a strip storage storing a chromatography strip. The chromatography strip is stored in a hollow part of the strip storage. The hollow part of the strip storage and an inner space of the sample receptor may be communicated in a closed condition under a state where the sample receptor and the lid are engaged. 1. A microtube comprising a sample receptor , a lid and a strip storage storing a chromatography strip , wherein ,the chromatography strip is stored in a hollow part of the strip storage, andunder a state where the sample receptor and the lid are engaged, the hollow part of the strip storage and an inner space of the sample receptor may be communicated in a closed state.2. The microtube according to claim 1 , whereinthe lid and the strip storage have an integrated configuration, where the chromatography strip is enclosed in the hollow part of the strip storage,the hollow part of the strip storage and the inner space of the sample receptor are brought into communication by breaking through the lid with the chromatography strip under a state where the sample receptor has been engaged with the lid.3. The microtube according to claim 2 , wherein the strip storage has a bellows section so as to be stretchable and contractable.4. The microtube according to further comprising a communication part which transiently separates the hollow part of the strip storage from the inner space of the sample receptor.5. The microtube according to claim 4 , wherein the communication part is made of an elastic material.6. The microtube according to claim 4 , wherein the chromatography strip is fixed onto the strip storage.7. The microtube according to claim 4 , wherein the strip storage comprises a liquid chamber part.8. The microtube according to claim 5 , wherein the chromatography strip is fixed onto the strip storage.9. The microtube according to claim 5 , wherein the strip storage comprises a liquid chamber part. This application ...

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02-02-2017 дата публикации

Human Antibodies that Bind Human TNF-Alpha and Methods of Preparing the Same

Номер: US20170029495A1
Принадлежит:

Methylglyoxal (MGO)-modified recombinant TNF-alpha antibodies (e.g., Adalimumab) are identified. MGO modification decreases binding between Adalimumab and TNF-alpha. Methods are disclosed for reducing the presence of MGO-modified antibodies in the production of Adalimumab TNF-alpha antibodies. 1. A composition comprising a binding protein capable of binding TNF-alpha , wherein said binding protein comprises at least one methylglyoxal (MGO)-susceptible amino acid , and wherein at least a portion of said binding protein comprises one or more MGO-modified amino acids.2. The composition of claim 1 , wherein the portion of the binding protein that comprises at least one MGO-modified amino acid is less than 12%.3. The composition of claim 1 , wherein the portion of the binding protein that comprises at least one MGO-modified amino acid is less than 6%.4. The composition of claim 1 , wherein the MGO-susceptible amino acid is an arginine.5. The composition of claim 1 , wherein the binding protein is a human antibody or an antigen-binding portion thereof claim 1 , wherein the binding protein dissociates from human TNF-alpha with a Kof 1×10M or less and a Krate constant of 1×10sor less claim 1 , both as determined by surface plasmon resonance claim 1 , and wherein the binding protein neutralizes human TNF-alpha cytotoxicity in a standard in vitro L929 assay with an ICof 1×10M or less.6. A composition comprising a binding protein capable of binding TNF-alpha claim 1 , said binding protein comprising a methylglyoxal (MGO)-susceptible amino acid claim 1 , wherein said composition is prepared by substantially removing molecules of said binding protein that comprise at least one MGO-modified amino acid.7. The composition of claim 6 , wherein more than 70% of said molecules that comprise at least one MGO-modified amino acid is removed.8. The composition of claim 6 , wherein more than 90% of said molecules that comprise at least one MGO-modified amino acid is removed.9. The ...

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02-02-2017 дата публикации

ACOUSTIC AFFINITY SEPARATION

Номер: US20170029802A1
Принадлежит:

Methods and systems for separating a first biomaterial from a second biomaterial can use functionalized material retained in a liquid-filled chamber at locales within an acoustic standing wave field. A culture suspension containing the first biomaterial and the second biomaterial flows into the liquid-filled chamber and at least portions of the first biomaterial with features complementary to the functionalized material becomes bound to the functionalized material while other portions of the culture suspension containing the second material pass through the chamber. The portion of the first biomaterial bound to the functionalized material is subsequently released from the liquid filled chamber. 1. A method of separating a first biomaterial from a second biomaterial , the method comprising:retaining functionalized material in a liquid-filled chamber at locales within an acoustic standing wave field, the locales distributed inside the chamber where acoustic pressure amplitude is either elevated compared to when the acoustic transducer is turned off, or substantially identical to when the acoustic transducer is turned off;flowing a culture suspension containing the first biomaterial and the second biomaterial into the liquid-filled chamber where functionalized material has been retained by acoustic insonification such that at least portions of the first biomaterial with features complementary to the functionalized material become bound to the functionalized material while other portions of the culture suspension containing the second material pass through the chamber, the first material being at least two orders of magnitude smaller than the second material; andsubsequently releasing the portion of the first biomaterial bound to the functionalized material from the liquid filled chamber.2. The method of claim 1 , wherein flowing the culture suspension containing the first and the second biomaterials into the liquid-filled chamber comprises circulating the cell culture ...

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02-02-2017 дата публикации

METHOD AND DEVICE FOR TWO-DIMENSIONAL SEPARATION OF IONIC SPECIES

Номер: US20170030860A1
Принадлежит:

The invention relates to a method which realizes a two-dimensional separation of ionic species on the basis of the online coupling of ion chromatography (IC) and capillary electrophoresis (CE). A device for IC×CE coupling, its implementation in terms of two alternatives, the connection to a mass spectrometric detector, and corresponding application are described. 1. Device for continuous two-dimensional separation of ionic species comprisinga) an ion chromatography (IC) system, comprising a suppressor;b) a capillary electrophoresis (CE) system comprising an electrolyte vessel and a high voltage electrode; andc) a modulator, for transferring effluent of the IC system to the CE system, comprising a transfer capillary and injector means, wherein the injector means are adapted to provide discrete volume segments of effluent.2. The device of claim 1 , wherein the injector means comprises a positioning and guidance system for modifying the distance between the outlet of the transfer capillary and the inlet of a separation capillary in controlled manner.3. The device of claim 1 , wherein the injector means comprises a switching valve between transfer capillary and separation capillary for controlling and guiding volume segments of the effluent to the inlet of the separation capillary.4. The device of claim 1 , wherein the injector means comprises a microprocessor for controlling the provision and/or delivery of volume segments.5. The device of claim 1 , wherein the CE separation capillary is a short capillary electrophoresis (CE) separation capillary claim 1 , which is less than 50 cm in length claim 1 , and has an inner diameter of less than 100 μm claim 1 , wherein the inlet of the separation capillary is in alignment with the outlet of the transfer capillary.6. Device according to claim 1 , further comprising a detector connected to the outlet of the separation capillary claim 1 , wherein optionally the detector is a mass spectrometer.7. Method for two-dimensional ...

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04-02-2016 дата публикации

QUANTITATION OF AMINES IN HYDROCARBONS

Номер: US20160033459A1
Принадлежит: Phillips 66 Company

The present disclosure relates to methods for quantitation of amines in hydrocarbon stream. More specifically, the disclosure relates to rapid, precise and highly-sensitive methods for quantitating hydrogen sulfide-scavenging amines in crude petroleum oil or refinery streams. 1. A process for quantitation of amines in a petroleum oil , comprising:(a) warming a petroleum oil sample to a temperature of between 20° C. and 150° C.;(b) adding water and a solvent to the sample to create an extraction mixture, wherein the water is added at a ratio ranging from about 1:10 to about 10:1 (by volume), and wherein the solvent is added at a ratio ranging from about 1:10 to about 10:1 (by volume);(c) heating the extraction mixture to a temperature ranging from 50° C. to 160° C., and maintaining at a constant the temperature for a period of time ranging from 5 minutes to 5 hours to produce an extracted amine mixture comprising an oil phase and an aqueous phase;(d) analyzing at least a portion of the aqueous phase by ion chromatography for quantitation of amines.2. The process of claim 1 , wherein during the warming claim 1 , the petroleum oil sample is sonicated to increase homogeneity.3. The process of claim 1 , wherein the heating is supplied by microwaves.4. The process of claim 1 , wherein the solvent is at least partially soluble in the petroleum oil sample claim 1 , but immiscible with the water.5. The process of claim 1 , wherein the solvent reduces the viscosity of the oil phase and increases surface area contact between the oil and aqueous phases.6. The process of claim 1 , wherein during the extraction claim 1 , the pH is kept in a range of between 1 and about 6 to increase solubility of the amines in the aqueous phase.7. The process of claim 1 , wherein the heating of the extraction mixture is conducted for a period of time ranging from 5 minutes to 5 hours.8. The process of claim 1 , wherein the heating is conducted for a period of time ranging from 20 minutes to 2 ...

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01-02-2018 дата публикации

DEVICE AND METHOD FOR ANALYSIS OF BIOFLUIDS BY ION GENERATION USING WETTED POROUS MATERIAL

Номер: US20180033600A1

The present disclosure provides a mass spectrometry cartridge and methods of use thereof. 1. A mass spectrometry cartridge comprising:a sample holder;a base;a solid phase extraction column, wherein the solid phase extraction column is disposed within the sample holder; anda first absorbent unit, wherein the first absorbent unit is configured for use with a mass spectrometer.2. The mass spectrometry cartridge according to claim 1 , further comprising a second absorbent unit disposed within the base.3. The mass spectrometry cartridge according to claim 2 , wherein the sample holder is slidably disposable within the base.4. The mass spectrometry cartridge according to claim 3 , wherein the sample holder is slidably disposable between a first extraction position claim 3 , in which the solid phase extraction column is disposed above the second absorbent unit claim 3 , and a second elution position claim 3 , in which the solid phase extraction column is disposed above the first absorbent unit.5. The mass spectrometry cartridge according to claim 1 , wherein the sample holder is slidably disposable within the base.6. The mass spectrometry cartridge according to claim 1 , further comprising a cover claim 1 , wherein the cover is disposed above the solid phase extraction column.7. The mass spectrometry cartridge according to claim 1 , wherein the solid phase extraction column is configured for at least one sample selected from the group consisting of: blood claim 1 , plasma claim 1 , urine claim 1 , bile claim 1 , water claim 1 , liquid foodstuffs claim 1 , and mixtures thereof.8. The mass spectrometry cartridge according to claim 1 , wherein the base is configured to allow an electrical potential to reach the first absorbent unit.9. The mass spectrometry cartridge according to claim 8 , wherein the base comprises a wire.10. The mass spectrometry cartridge according to claim 9 , wherein the sample holder comprises a metallic contact.11. The mass spectrometry cartridge ...

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11-02-2016 дата публикации

METHOD FOR REDUCING SUPPRESSOR NOISE

Номер: US20160041133A1
Принадлежит:

An electrolytic method for suppressing liquid eluent containing previously separated sample analyte anions, counterions to the sample anions, and non-sample anions suppressible to weak acids in an electrolytic device comprising a housing defining at least a sample stream flow channel and an ion receiving flow-through channel separated by an ion exchange bather. The sample stream flow channel includes an upstream channel portion and a downstream channel portion. A first current is applied across the upstream channel portion for substantially completely suppression. A second current is applied across the downstream channel portion at a magnitude of less than 10% of the magnitude of the first current. 1. An electrolytic method for suppressing liquid eluent containing previously separated sample analyte anions , counterions to said sample anions , and non-sample anions suppressible to weak acids; using an electrolytic device comprising a housing defining at least a sample stream flow channel and an ion receiving flow-through channel , said sample stream flow channel being adjacent to said ion receiving flow channel; a first ion exchange barrier which permits ion transport and blocks bulk liquid flow disposed between said sample stream flow channel and said ion receiving flow channel , said sample stream flow channel including an upstream channel portion and a downstream channel portion; and high capacity ion exchange medium disposed in said downstream channel portion; said method comprising applying a first current across said upstream channel portion to substantially completely suppress said counterions and to convert said non-sample anions to weak acids in said upstream channel portion by transport of said counterion across said first ion exchange barrier; applying a second current across said downstream channel portion to substantially reduce the noise of said weak acids during subsequent detection , said second current being at a magnitude of less than 10% of the ...

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09-02-2017 дата публикации

Multi-Trace Quantitation

Номер: US20170038351A1
Автор: Gordana Ivosev
Принадлежит: DH TECHNOLOGIES DEVELOPMENT PTE LTD

Systems and methods are provided for calculating the area of a peak profile using information from one or more correlated peak profiles. One or more compounds are separated from a mixture over time using a separation device. Traces of the one or more compounds are monitored during the separation using a tandem mass spectrometer. A plurality of intensity measurements are received using a processor. A first peak profile for a compound of interest is detected from the plurality of intensity measurements for a first trace and one or more correlated peak profiles for the compound of interest are detected from the plurality of intensity measurements for one or more other traces using the processor. An area of the first peak profile is calculated based on the one or more correlated peak profiles using the processor.

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15-02-2018 дата публикации

SYSTEMS AND METHODS FOR CHARACTERIZING RADIOACTIVE ANALYTES

Номер: US20180045692A1
Автор: Elizarov Arkadij M.
Принадлежит:

A device for automated characterization of radioactive analytes that provides an integrated system with liquid handling and plate reading components. The device can be further configured to include a chromatographic subsystem. Also provided is a method of using such a device, providing addition of a radioactive sample and a sequence of operations involving the abovementioned components of the system. The system is configured with radiation shielding in such a way that manipulations of radioactive samples do not interfere with concurrent radioactive measurements. 1. A device for performing an analysis , comprising:a plate reader; anda liquid handler,wherein at least a portion of the liquid handler is positioned above the plate reader.2. The device of claim 1 , further comprising a radiation shield claim 1 ,wherein the radiation shield is interposed between the liquid handler and the plate reader.3. The device of claim 1 , further comprising a radiation shield claim 1 ,wherein at least a portion of the radiation shield is positioned within a portion of the device selected from the group consisting of the liquid handler and the plate reader.4. The device of wherein the device is configured for analysis of a radiopharmaceutical.5. The device of wherein the device is configured to operate in combination with a palette.6. The device of claim 1 , wherein the liquid handler is configured to deliver a liquid to locations within the plate reader.7. A method for automated sample analysis claim 1 , comprising the steps of transferring a liquid using a liquid handler and obtaining an optical reading.8. The method of wherein the optical reading is performed utilizing an optical reader characterized by being sensitive to background radiation.9. The method of wherein the optical reading is unaffected by a radiation source located in the liquid handler.10. An injection device for performing an analysis of a sample claim 8 , comprising a chromatographic injection device that is ...

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03-03-2022 дата публикации

MICROTUBE

Номер: US20220065830A1
Автор: ASOGAWA Minoru
Принадлежит: NEC Corporation

A microtube comprises a sample receptor, a lid and a strip storage storing a chromatography strip. The chromatography strip is stored in a hollow part of the strip storage. The hollow part of the strip storage and an inner space of the sample receptor may be communicated in a closed condition under a state where the sample receptor and the lid are engaged.

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14-02-2019 дата публикации

HUMAN ANTIBODIES THAT BIND HUMAN TNF-ALPHA AND METHODS OF PREPARING THE SAME

Номер: US20190048069A1
Принадлежит: AbbVie Inc.

Methylglyoxal (MGO)-modified recombinant TNF-alpha antibodies (e.g., Adalimumab) are identified. MGO modification decreases binding between Adalimumab and TNF-alpha. Methods are disclosed for reducing the presence of MGO-modified antibodies in the production of Adalimumab TNF-alpha antibodies. 1. A composition comprising a binding protein capable of binding TNF-alpha , wherein said binding protein comprises at least one methylglyoxal (MGO)-susceptible amino acid , and wherein at least a portion of said binding protein comprises one or more MGO-modified amino acids.2. The composition of claim 1 , wherein the portion of the binding protein that comprises at least one MGO-modified amino acid is less than 12%.3. The composition of claim 1 , wherein the portion of the binding protein that comprises at least one MGO-modified amino acid is less than 6%.4. The composition of claim 1 , wherein the MGO-susceptible amino acid is an arginine.5. The composition of claim 1 , wherein the binding protein is a human antibody or an antigen-binding portion thereof claim 1 , wherein the binding protein dissociates from human TNF-alpha with a Kof 1×10M or less and a Krate constant of 1×10sor less claim 1 , both as determined by surface plasmon resonance claim 1 , and wherein the binding protein neutralizes human TNF-alpha cytotoxicity in a standard in vitro L929 assay with an ICof 1×10M or less.6. A composition comprising a binding protein capable of binding TNF-alpha claim 1 , said binding protein comprising a methylglyoxal (MGO)-susceptible amino acid claim 1 , wherein said composition is prepared by substantially removing molecules of said binding protein that comprise at least one MGO-modified amino acid.7. The composition of claim 6 , wherein more than 70% of said molecules that comprise at least one MGO-modified amino acid is removed.8. The composition of claim 6 , wherein more than 90% of said molecules that comprise at least one MGO-modified amino acid is removed.9. The ...

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13-02-2020 дата публикации

Dmd based uv absorption detector for liquid chromatography

Номер: US20200049674A1

A detector for use in liquid chromatography is provided. The detector includes a light delivery system comprising a light source that emits one or more spectral lines of light of a light spectrum. The detector has an entrance slit configured to receive the one or more spectral lines of light and a wavelength selection module comprising a digital micro-mirror device. The digital micro-mirror device is configured to redirect the one or more spectral lines of light to a flow cell. The flow cell is optically connected to the wavelength selection module.

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10-03-2022 дата публикации

Reaction method for reacting reaction object with liquid containing the reaction object being in contact with granular porous body

Номер: US20220072510A1
Принадлежит: SNG Inc

A method for reacting a reaction object with a liquid containing the reaction object in contact with a granular porous body. The upper limit D (mm) of the particle diameter of the granular porous body is determined from D=0.556×LN (T)+0.166 in a column flow method in non-circulation type, and determined from D=0.0315×T+0.470 in the column flow method in a circulation type and a shaking method. The granular porous body includes a skeleton body including an inorganic compound having a three-dimensional continuous network structure, and has a two-step hierarchical porous structure including through-holes formed in voids in the skeleton body, and pores extending from a surface to an inside of the skeleton body and dispersed on the surface. A functional group having affinity with the metal ion is chemically modified on a surface of the granular porous body.

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03-03-2016 дата публикации

ULTRATHIN LAYER CHROMATOGRAPHY PLATES COMPRISING ELECTROSPUN NANOFIBERS

Номер: US20160059151A1
Автор: Fang Xin, OLESIK Susan V.
Принадлежит:

An ultrathin-layer chromatography plate comprising a stationary phase including electrospun composite nanofibers comprising a polymer and at least one of multi-walled carbon nanotubes, edge-plane ordered carbon nanorods and amorphous carbon nanorods, wherein the stationary phase has a thickness between about 5 μm and about 30 μm. 1. An ultrathin-layer chromatography plate comprising a stationary phase including electrospun composite nanofibers comprising a polymer and at least one of multi-walled carbon nanotubes , edge-plane ordered carbon nanorods and amorphous carbon nanorods , wherein the stationary phase has a thickness between about 5 μm and about 30 μm.2. The ultrathin-layer chromatography plate of claim 1 , wherein the composite nanofibers comprise between 0% and about 2% by weight of multi-walled carbon nanotubes.3. The ultrathin-layer chromatography plate of claim 2 , wherein the surface of the multi-walled carbon nanotubes include carboxylic acid functional groups.4. The ultrathin-layer chromatography plate of claim 2 , wherein the composite nanofibers have an average diameter between about 250 nm and about 450 nm.5. The ultrathin-layer chromatography plate of claim 1 , wherein the composite nanofibers comprise between 0% and about 1% edge-plane ordered carbon nanorods.6. The ultrathin-layer chromatography plate of claim 1 , wherein the composite nanofibers comprise between 0% and about 1% amorphous carbon nanorods.7. The ultrathin-layer chromatography plate of claim 5 , wherein the composite nanofibers have an average diameter between about 300 nm and about 600 nm.8. The ultrathin-layer chromatography plate of claim 1 , wherein the polymer is selected from a polyacrylonitrile claim 1 , an epoxide polymer claim 1 , a polycaprolactone claim 1 , a polystyrene claim 1 , a polyvinyl alcohol claim 1 , a poly(methyl methacrylate) claim 1 , a polyhydroxyalkanoate claim 1 , and a polyethylene.9. The ultrathin-layer chromatography plate of claim 8 , wherein the ...

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10-03-2022 дата публикации

Intra-droplet surface engineering to capture a molecular target

Номер: US20220074930A1

The present invention relates to a method for capturing a molecular target present in the aqueous phase of a water-in-oil emulsion, said method being based on the use of a binding system comprising (a) a surfactant bearing a functional moiety on its hydrophilic head group and (b) a chemoprobe that acts as a molecular staple between the functionalized surfactant and the molecular target and comprises at least two distinct domains namely (i) at least one capture moiety which is able to specifically bind the molecular target and (ii) at least one binding domain which is able to interact with the functional group of the surfactant through covalent or non-covalent interactions, directly or through a binding intermediary.

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21-02-2019 дата публикации

MINI POINT OF CARE GAS CHROMATOGRAPHIC TEST STRIP AND METHOD TO MEASURE ANALYTES

Номер: US20190056362A1
Принадлежит: Biometry Inc.

A mini point of care gas chromatographic test strip and method to measure analytes is disclosed. A system for determining the concentration of at least one analyte in a fluid sample having a plurality of analytes includes a base substrate, a first electrode pair disposed over the base substrate, and a first sensing chemistry responsive to at least one analyte in the sample. The first sensing chemistry is in electrical communication with the first electrode pair, and a first chromatographic layer is disposed over the at least one sensing chemistry. At least one analyte of the plurality of analytes moves through the first chromatographic layer at a different rate relative to the movement of other analytes of the plurality of analytes. 1. A system for determining the concentration of at least one analyte in a fluid sample having a plurality of analytes , the system comprising:a base substrate;a first electrode pair disposed over the base substrate;a first sensing chemistry responsive to at least one analyte in the sample, wherein the first sensing chemistry is in electrical communication with the first electrode pair; anda first chromatographic layer disposed over the at least one sensing chemistry, wherein at least one analyte of the plurality of analytes moves through the first chromatographic layer at a different rate relative to the movement of other analytes of the plurality of analytes.2. The system of claim 1 , further comprising a second electrode pair disposed over the substrate and a second sensing chemistry responsive to at least one analyte in the sample claim 1 , wherein the second sensing chemistry is in electrical communication with the second electrode pair.3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. The system of claim 2 , wherein at least one of a physical claim 2 , optical claim 2 , and electrical property of the first sensing chemistry changes when exposed to at least one analyte of the plurality of analytes to a different degree relative ...

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02-03-2017 дата публикации

Method for determining prognosis of renal cell carcinoma

Номер: US20170058355A1

It is intended to provide a rapid, convenient, and highly accurate method for determining the prognosis of cancer. The present invention provides a method for determining the prognosis of a renal cell carcinoma patient, comprising: (1) treating genomic DNA prepared from a renal tissue of a subject with bisulfite; (2) amplifying the bisulfite-treated DNA by PCR; (3) subjecting the obtained PCR amplification product to ion exchange chromatography; (4) obtaining the retention time of a detection signal obtained by the chromatography; and (5) determining the renal cell carcinoma of the subject as having poor prognosis when the result of the step (4) is shorter than a retention time serving as a reference.

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22-05-2014 дата публикации

METHODS AND COMPOSITIONS FOR IMPROVED ION-EXCHANGE CHROMATOGRAPHY

Номер: US20140137639A1
Принадлежит:

The invention generally relates to ion-exchange chromatography. More particularly, the invention relates to compositions and methods that can substantially improve analytical sensitivity and/or selectivity of ion-exchange chromatography as well its efficiency and quality as a purification or preparation tool. 1. A method for analyzing or purifying one or more ionic analytes in a sample by anion-exchange chromatography , comprising:providing an anion-exchange column packed with an anion-exchange stationary phase;providing an anion-exchange mobile phase having a modifying agent;performing anion-exchange chromatography under a condition allowing anion exchange between the one or more ionic analytes in the sample and the anion-exchange stationary phase, thereby separating the one or more ionic analytes in the anion-exchange column; andanalyzing and/or collecting the separated one or more ionic analytes.2. The method of claim 1 , wherein at least one of the one or more ionic analytes comprises a polyethylene-glycol moiety.3. The method of claim 2 , wherein the modifying agent is an organic compound comprising at least three units of moiety claim 2 , wherein the moiety is independently selected from C—O—C moiety or —OH group.4. The method of claim 3 , wherein the modifying agent comprises a polyol moiety.5. The method of claim 3 , wherein the modifying agent comprises an oligomeric alkylene oxide moiety.6. The method of claim 5 , wherein at least one of the one or more ionic analytes comprises a polyethylene glycol-conjugated oligonucleotide.7. The method of claim 6 , wherein the polyethylene glycol-conjugated oligonucleotide comprises from about 3 k Da to about 100 k Da of polyethylene oxide and from about 5 to about 2 claim 6 ,000 units of nucleotides.8. The method of claim 5 , wherein the alkylene oxide oligomer is an ethylene oxide oligomer.9. The method of claim 8 , wherein the ethylene oxide oligomer comprises from about 3 k Da to about 100 k Da of polyethylene ...

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02-03-2017 дата публикации

SYSTEMS AND APPARATUS FOR REDUCING SIGNAL NOISE DUE TO PUMP OSCILLATIONS

Номер: US20170059534A1
Принадлежит:

A system reduces unwanted noise due to pump movement. The system includes a pump including a non-conductive piston extending into a pumping chamber for pumping the sample fluid along an analysis fluid path, a wash chamber, and a seal fluidly separating the pumping chamber from the wash chamber. The system also includes a wash path supplying a wash fluid from a wash reservoir to the wash chamber, an electrical conductor electrically connecting the analysis fluid path to the wash fluid path, and a ground conductor electrically connecting the electrical conductor to ground via a resistor. The electrical conductors and resistor combination between the chambers reduces unwanted noise in the conductivity detector due voltage potentials between the eluent and wash chambers created as the piston moves between the chambers. 1. An apparatus for reducing noise due to pump movement , the apparatus comprising:a pump for pumping a sample fluid along an analysis fluid path to a conductivity detector, the pump including a pumping chamber, a piston extending into the pumping chamber for pumping the sample fluid along the analysis fluid path, a seal wash chamber, and a seal fluidly separating the pumping chamber from the seal wash chamber, wherein the piston extends through the seal and creates a voltage potential between the pumping chamber and the seal washing chamber as the piston moves;a wash fluid path supplying a wash fluid from a wash reservoir to the seal washing chamber; andan electrical conductor for reducing noise in the conductivity detector due to pump movement, the electrical conductor electrically connecting the analysis fluid path to the wash fluid path.2. The analysis system according to claim 1 , wherein the piston is formed of sapphire.3. The analysis system according to claim 1 , wherein the electrical conductor is a platinum wire having a first end in electrical communication with the analysis fluid path and a second end in electrical communication with the wash ...

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08-03-2018 дата публикации

ELECTRODIALYTIC CAPILLARY SUPPRESSOR FOR SUPPRESSED CONDUCTOMETRIC ION CHROMATOGRAPHY

Номер: US20180065089A1

An electrodialytic device for ion chromatography, including aspects functioning as an eluent suppressor device and aspects functioning as an eluent generator device. In general, the device includes a monolithic block of ionomeric polymer material having (1) a first channel with an inlet port, an outlet port, and an active length of exposed polymer material disposed therebetween, (2) a second channel having an inlet port, an outlet port, and an active length of exposed polymer material disposed therebetween, (3) a first and second at-least-partially exposed electrodes positioned in electrical communication with the second channel, with the second electrode disposed, at least in part, across the second channel from the first electrode. A current flowing between the electrodes will drive an electrodialytic migration of ions between the active lengths, from an eluent stream in the case of a suppression device or into an eluent stream in the case of a generator device. 1. An electrodialytic device for ion chromatography comprising a monolithic block of ionomeric polymer material , the block including:a first channel having an inlet port, an outlet port, and an active length of exposed polymer material disposed therebetween;a second channel having an inlet port, an outlet port, and an active length of exposed polymer material disposed therebetween;a first at-least-partially exposed electrode positioned in electrical communication with the second channel; anda second at-least-partially exposed electrode positioned in electrical communication with the second channel across from the first at-least-partially exposed electrode.2. The electodialytic device of claim 1 , wherein the active length of the first channel and the active length of the second channel are disposed so that at least 10 percent of a current applied across the first and second electrodes flows across the second channel.3. The electrodialytic device of claim 1 , wherein the ionomeric polymer material ...

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17-03-2016 дата публикации

THIN-LAYER CHROMATOGRAPHY PLATE, METHOD FOR PRODUCING SUCH A PLATE, AND METHOD FOR PERFORMING A THIN-LAYER CHROMATOGRAPHY SEPARATION

Номер: US20160077068A1
Автор: Schulz Michael
Принадлежит: Merck Patent GmBH

The present invention relates to a thin-layer chromatography plate at least consisting of a support and a sorbent layer, where the sorbent layer comprises at least one siloxane oligomer, to a process for the production thereof, and to a method for carrying out a thin-layer chromatographic separation using said thin-layer chromatography plate. 1. Thin-layer plate a support and a sorbent layer , where the sorbent layer comprises at least one siloxane oligomer.2. Thin-layer plate according to claim 1 , characterised in that the sorbent layer additionally comprises inorganic and/or organic particles.3. Thin-layer plate according to claim 1 , characterised in that the siloxane oligomer contains C1 to C18 alkyl groups and/or amino groups.4. Thin-layer plate according to claim 1 , characterised in that the siloxane oligomer is a co-condensate of at least one water-soluble silane and at least one water-insoluble silane.5. Thin-layer plate according to claim 1 , characterised in that the thickness of the sorbent layer is between 10 and 500 μm.6. Thin-layer plate according to claim 1 , which can be produced bya) preparation of a mixture at least comprising a siloxane oligomer and a solventb) application of the mixture from step b) to a supportc) temperature treatment of the thin-layer plate7. Process for the production of thin-layer plates bya) provision of a mixture which comprises at least one siloxane oligomer and a solventb) application of the mixture from step a) to a supportc) temperature treatment8. Process according to claim 7 , characterised in that step a) is carried out bya1) preparation of a suspension of inorganic and/or organic particles in a solventa2) mixing of the suspension from step a) with a siloxane oligomer9. Process according to claim 7 , characterised in that the solvent used is water.10. Process according to claim 7 , characterised in that the mixture applied to the support in step b) comprises between 1 and 40% by weight of siloxane oligomer and ...

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15-03-2018 дата публикации

SYSTEM AND METHOD FOR ANALYZING BIOLOGICAL FLUID IN MULTIPLE CUVETTES

Номер: US20180074027A1
Принадлежит: BODITECH MED INC.

Disclosed is a station, for testing an analyte in a sample, enabling accurate and quick reaction and analysis of the sample and a reagent in one apparatus. To this end, the present disclosure provides a station, which is for testing a sample by means of inserting a cuvette, having a standby chamber on which a collecting member is placed, a sample chamber, a reagent chamber and a detection unit. The station comprises: a housing which has an input/output part into which a cuvette is inserted; a driving unit which is provided inside the housing, horizontally moves the cuvette, vertically moves a collecting member, reacts a sample in a sample chamber and a reagent in a reagent chamber, and injects a reaction result thereof into a detection unit; and an optical reader which is provided on the horizontal movement path of the cuvette and is for analyzing the reaction result. 1. A method of analyzing biological sample fluid , the method comprising: wherein each cuvette comprises an elongated body with multiple wells and a chromatography inlet that are arranged along a longitudinal direction, wherein the multiple wells comprise a sample well into which the sample fluid is loaded for analysis, wherein the multiple wells further comprise at least one reaction well that contains a reaction composition, wherein each cuvette further comprises a chromatographic strip arranged behind the multiple wells in the longitudinal direction, the chromatographic strip comprising one end portion fluid communication with the chromatography inlet such that fluid received through the chromatography inlet is loaded at the end portion of chromatographic strip,', a cuvette holder configured to receive and hold two or more cuvettes, the cuvette holder being further configured to move along y axis such that cuvettes held in the cuvette holder move all together along y axis when the cuvette holder moves,', 'a pipette configured to take fluid from a well and release fluid into a well, the pipette being ...

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05-03-2020 дата публикации

VIAL CAP AND METHOD FOR REMOVING MATRIX COMPONENTS FROM A LIQUID SAMPLE

Номер: US20200072802A1
Принадлежит:

A vial cap for removing a matrix component from a liquid sample is described. The vial cap includes a cap body, an inlet portion, and an outlet portion. The cap body is configured to have a slidable gas and liquid seal with a side wall of a sample vial. The inlet portion includes a counterbore section that holds a filter plug. The filter plug includes a polyethylene resin and a material selected from the group consisting of an ion exchange material and a reversed-phase material. The vial cap is adapted for solid phase extraction for use in an autosampler with a plurality of sample vials. 1. A vial cap for removing a matrix component from a liquid sample and transferring the liquid sample in a sample vial to an injection valve at the same time , the vial cap comprising:a cap body including a liquid sample passageway, and an outer periphery configured to have a slidable gas and liquid seal with a side wall of a sample vial, the sample vial including a side wall, a bottom wall, and an inlet opening;an inlet portion configured to receive a pressurized liquid sample from the sample vial where the liquid sample flows into the liquid sample passageway, the inlet portion including a counterbore section, the counterbore section holding a filter plug, the filter plug comprising high density polyethylene resin particles fused together with a material selected from the group consisting of an ion exchange material and a reversed-phase material, the material physically entrapped within a void volume in the fused high density polyethylene;an outlet portion configured to output the liquid sample from the liquid sample passageway that has passed through the filter plug, the outlet portion including a plunger section configured to receive a downward force into a sample vial to pressurize the liquid sample within the sample vial.2. The vial cap of claim 1 , in which the reversed-phase material is configured to bind an ion pairing agent in a salt form claim 1 , an acid form claim 1 , ...

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29-03-2018 дата публикации

Method of Differentiating Stable Angina Pectoris from Acute Coronary Syndrome and Diagnostic Kit thereof

Номер: US20180088132A1
Принадлежит:

This application discloses a method of differentiating stable angina pectoris from acute coronary syndrome, including: obtaining a blood plasma sample from a patient; measuring a relative concentration of at least one metabolic biomarker in the blood plasma sample, wherein the at least one metabolic biomarker is selected from the group consisting of malic acid, taurine, arachidonic acid, citramalic acid, methionine, and pentadecanoic acid; calculating a value according to the relative concentration of at least one metabolic biomarker; comparing the value with a predefined critical value, if the value is more than the predefined critical value, the patient has the acute coronary syndrome, otherwise, the patient has the stable angina pectoris. The method and a diagnostic kit thereof is capable of differential diagnosis of SA and ACS and it can improve the diagnostic convenience and promote the diagnostic standardization. 1. A method of differentiating stable angina pectoris from acute coronary syndrome , comprising:obtaining a blood plasma sample from a patient;measuring a relative concentration of at least one metabolic biomarker in the blood plasma sample, wherein the at least one metabolic biomarker is selected from the group consisting of malic acid, taurine, arachidonic acid, citramalic acid, methionine, and pentadecanoic acid;obtaining a differentiating value according to the relative concentration of at least one metabolic biomarker;comparing the differentiating value with a predefined critical value, if the differentiating value is more than the predefined critical value, the patient has the acute coronary syndrome, otherwise, the patient has the stable angina pectoris.2. The method of claim 1 , wherein the step of measuring a relative concentration of at least one metabolic biomarker in the blood plasma sample further comprises the following steps:adding an internal standard of 2-isopropyl malic acid into the blood plasma to obtain the blood plasma having the ...

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21-03-2019 дата публикации

ANALYSIS MEMBRANES FOR MICROFLUIDIC DEVICES, SAID MEMBRANES BEING MADE OF A FIBERGLASS MATERIAL

Номер: US20190086404A1
Принадлежит: BIOMERIEUX

An analysis membrane of a microfluidic device, said membrane being made in one piece from a liquid-diffusing absorbent material of glass fiber-based composition, said analysis membrane including: at least one zone termed depositing zone, at least one zone termed reaction zone, in which at least one reagent is adsorbed directly to said glass fiber liquid-diffusing material, or indirectly by virtue of a coupling agent, and channels which ensure a fluidic communication between these depositing zone(s) and reaction zone(s), and that at least one reaction zone is circumscribed in a space of the analysis membrane, termed slowed diffusion space, inside which the channels which arrive upstream and/or the channels which depart again downstream: extend into one or more channels of smaller length, and/or extend into one or more channels of smaller width, and/or extend into one or more channels comprising at least one portion having a winding path. 1. An analysis membrane of a microfluidic device , formed in one piece from a sheet of liquid diffusing absorbent material of glass fiber-based composition , said analysis membrane comprising:at least one zone termed depositing zone,at least one zone termed reaction zone, in which at least one reagent is adsorbed directly to said glass fiber liquid-diffusing material, or indirectly by virtue of a coupling agent,channels which ensure a fluidic communication between depositing zone(s) and reaction zone(s),wherein at least one reaction zone is circumscribed in a space of the analysis membrane, termed slowed diffusion space, inside which the channels which arrive upstream and/or the channels which depart again downstream:extend into one or more channels of smaller width, and/orextend into one or more channels of smaller thickness, and/orextend into one or more channels comprising at least one portion with a winding path.2. The analysis membrane as claimed in claim 1 , wherein at least one of its two faces is coated with a mechanical ...

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09-04-2015 дата публикации

PROCESS FOR NORMALIZING THE CONCENTRATION OF ANALYTES IN A URINE SAMPLE

Номер: US20150099312A1
Автор: Mischak Harald
Принадлежит:

Process for normalizing the concentration of at least one analyte in a urine sample, comprising the following steps: 1. A process for normalizing the concentration of at least one analyte in a urine sample , comprising the following steps:a) associating at least a portion of the urine sample with an analytical instrument to determine the concentration of at least one analyte in the sample;b) associating at least a portion of the urine sample with an analytical instrument to determine the concentration of at least one collagen or collagen fragment within the sample, wherein the determining of the concentration of the at least one collagen or collagen fragment comprises 1) separating at least one collagen or collagen fragments from the sample or a portion thereof; 2) performing mass spectrometry; or using a combination of 1) and 2); andc) normalizing the concentration of said at least one analyte relative to the concentration of said at least one collagen or collagen fragment.2. The process according to claim 1 , wherein the urine sample is subdivided by separation into several subsamples before the concentration of the analyte is determined.3. The process according to claim 2 , wherein said separation is effected by:chromatographic methods,adsorption to specific materials, orelectrophoretic methods.4. The process according to claim 1 , wherein said determination of the concentration of analytes and/or collagen or collagen fragments is effected by a UV/Vis detector claim 1 , fluorescence detector claim 1 , refractive index detector claim 1 , diode array detector claim 1 , mass spectrometer claim 1 , or gel scanner.5. The process according to claim 1 , wherein said at least one collagen or collagen fragment is identified by its migration or retention time and optionally further suitable parameters including mass spectra claim 1 , UV/Vis spectra claim 1 , fluorescence spectra claim 1 , or affinity for particular ligands including antibodies.6. The process according to ...

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09-04-2015 дата публикации

NOVEL LIPASE INHIBITORS, REPORTER SUBSTRATES AND USES THEREOF

Номер: US20150099800A1
Автор: Duclos, JR. Richard I.
Принадлежит:

The invention provides for novel lipase inhibitors, and compositions and devices comprising the same. The invention further provides for methods for treatment of disorders comprising administration of novel diacylglycerol lipase inhibitors, and compositions and devices comprising said inhibitors. In some embodiments, the disorders are pancreatitis, obesity, shock or pancreatic necrosis. The invention further provides for novel ether lipid reporter compounds and methods of assaying enzymatic activity comprising contacting a compound with a novel ether lipid reporter compound. 2. The compound of claim 1 , wherein at least one of B or X is a solid support.3. The compound of claim 1 , wherein{'sub': 1', '6', '6', '12, 'R is (C-C)-alkyl or (C-C)-aryl;'}{'sub': 1', '3, 'A is a linking group comprising —V—, —V—O—, —V—S—, —V—N(H)—, or —V—N((C-C)-alkyl)-;'}{'sub': 1', '12', '2', '2', 'n', '1', '12', '2', '2', 'n, 'V is (C-C)-alkyl or —(OCHCH)—, wherein any carbon atom in said (C-C)-alkyl or —(OCHCH)— is optionally replaced with one or more heteroatom, cycloalkyl group, heterocycle, aryl or heteroaryl group;'}B is a solid support or H;X is a solid support or H, wherein at least one of B or X is a solid support;{'sub': 1', '3, 'Y is a linking group comprising -J-, —O-J-, —S-J-, —N(H)-J-, or —N((C-C)-alkyl)-J-;'}{'sub': 1', '12', '2', '2', 'n', '1', '12', '2', '2', 'n, 'J is (C-C)-alkyl or —(OCHCH)—, wherein any carbon atom in said (C-C)-alkyl or —(OCHCH)— is optionally replaced with one or more heteroatom, cycloalkyl group, heterocycle, aryl or heteroaryl group; and'}each n is independently 0-100.4. The compound of claim 1 , wherein{'sub': 1', '6', '6', '12, 'R is (C-C)-alkyl or (C-C)-aryl;'}{'sub': 1', '3, 'A is a linking group comprising —V—, —V—O—, —V—S—, —V—N(H)—, or —V—N((C-C)-alkyl)-;'}{'sub': 1', '12', '2', '2', 'n', '1', '12', '2', '2', 'n, 'V is (C-C)-alkyl or —(OCHCH)—, wherein any carbon atom in said (C-C)-alkyl or —(OCHCH)— is optionally replaced with one or more ...

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28-03-2019 дата публикации

HIGH PURITY CHROMATOGRAPHIC MATERIALS COMPRISING AN IONIZABLE MODIFIER

Номер: US20190091606A1
Принадлежит: WATERS TECHNOLOGIES CORPORATION

The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are high purity chromatographic materials comprising a chromatographic surface wherein the chromatographic surface comprises a hydrophobic surface group and one or more ionizable modifier. 117-. (canceled)19. The high purity chromatographic material of claim 18 , wherein the ratio of the hydrophobic surface group:ionizable modifier is from about 2.5:1 to about 12:1.20. The high purity chromatographic material of claim 18 , wherein m is 2 or 3.21. The high purity chromatographic material of claim 18 , wherein the ionizable modifying reagent is 2-(2-(trichlorosilyl)ethyl)pyridine claim 18 , 2-(2-(trimethoxy)ethyl)pyridine claim 18 , 2-(2-(triethoxy)ethyl)pyridine claim 18 , 2-(4-pyridylethyl)triethoxysilane claim 18 , 2-(4-pyridylethyl)trimethoxysilane claim 18 , 2-(4-pyridylethyl)trichlorosilane.22. The high purity chromatographic material of claim 18 , further comprising a chromatographic core material.23. The high purity chromatographic material of claim 22 , wherein the chromatographic core material is a silica material or a hybrid inorganic/organic material.24. The high purity chromatographic material of claim 23 , wherein the chromatographic core material is a superficially porous material.25. The high purity chromatographic material of claim 18 , wherein the hydrophobic surface group is a C4 to C30 bonded phase claim 18 , an aromatic claim 18 , a phenylalkyl claim 18 , a fluoro-aromatic claim 18 , a phenylhexyl claim 18 , a pentafluorophenylalkyl claim 18 , or a chiral bonded phase26. A method for preparing a high purity chromatographic material according to comprising the steps of:reacting a ...

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12-05-2022 дата публикации

ION SUPPRESSOR

Номер: US20220146476A1
Принадлежит:

First and second electrode liquid seal members are arranged between a first electrode and a second electrode. First and second ion exchange membranes are arranged between a first electrode liquid seal member and a second electrode liquid seal member. An eluent seal member is arranged between a first ion exchange membrane and a second ion exchange membrane. Ion exchange is performed between an eluent that passes through an eluent flow path of the eluent seal member from a separation column and an electrode liquid that passes through each of electrode liquid flow paths of the first and second electrode liquid seal members. In a first surface of the eluent seal member that comes into contact with the first ion exchange membrane, a first projection that surrounds the entire circumference of the eluent flow path to extend along the edge of the eluent flow path and projects toward the first ion exchange membrane is formed. 1. An ion suppressor that performs ion exchange between an eluent and an electrode liquid from a separation column of an ion chromatograph , comprising:first and second electrodes;first and second electrode liquid seal members arranged between the first electrode and the second electrode, and respectively have electrode liquid flow paths through which an electrode liquid passes;first and second ion exchange membranes arranged between the first electrode liquid seal member and the second electrode liquid seal member; andan eluent seal member arranged between the first ion exchange membrane and the second ion exchange membrane and has an eluent flow path through which an eluent passes, whereinthe eluent seal member has a first surface that comes into contact with the first ion exchange membrane, anda first projection that surrounds an entire circumference of the eluent flow path to extend along an edge of the eluent flow path and projects toward the first ion exchange membrane is formed.2. The ion suppressor according to claim 1 , whereina projection ...

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28-03-2019 дата публикации

METHOD AND SYSTEM FOR MEASURING CONTENT OF DISSOLVED ORGANIC HALOGENS IN WATER

Номер: US20190094191A1
Автор: BU Yinan, CHEN Baiyang

A method and system for measuring the content of dissolved organic halide in water. The method includes separating dissolved inorganic halides and dissolved organic halides in water using an electrodialysis technique (S), which may completely separate the dissolved organic halides and the dissolved inorganic halides, avoid the use of activated carbon and adsorption columns, simplify steps and improve efficiency. The method converts the separated dissolved organic halides into dissolved inorganic halides using a photocatalysis technique (S), which does not need a special high-temperature combustion device, active carbon and catalysts, and is simple and easy to be performed at room temperature in more environmentally friendly mode. The method also includes analyzing the converted dissolved inorganic halides using a device with an ion analysis function (S) to analyze and measure a total content index of the dissolved organic halides and an individual content index of each of the dissolved organic halides (fluorine, chlorine, bromine and iodine) in water to be measured. 1. A method for content measurement of dissolved organic halide in water , the method comprising:separating a dissolved inorganic halide and a dissolved organic halide in a water sample to be measured using an electrodialysis technique;converting the separated dissolved organic halide into a dissolved inorganic halide; andmeasuring a content of the dissolved organic halide in the water sample to be measured by analyzing the converted dissolved inorganic halide using an ion analysis instrument.2. The method of claim 1 , wherein the separating the dissolved inorganic halide and the dissolved organic halide in the water sample to be measured using the electrodialysis technique includes:providing an electrodialyser including a first concentration chamber, a dilution chamber, and a second concentration chamber arranged in order;injecting an inorganic electrolyte solution without halogens into the first ...

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26-03-2020 дата публикации

IODIDE DETECTION IN BLOOD PLASMA SAMPLES

Номер: US20200096496A1
Принадлежит:

The present invention relates to methods for measuring a concentration of iodide in a plasma sample obtained from a subject by removing an amount of protein from the plasma sample, e.g. by precipitating protein from the plasma sample, and then measuring the concentration of the iodide in the plasma sample with ion chromatography. 1. A method for measuring a concentration of iodide in a plasma sample obtained from a subject , comprising the steps of:(a) removing an amount of protein from the plasma sample; and(b) measuring the concentration of the iodide in the sample with ion chromatography.2. The method of claim 1 , wherein the subject is a mammal.3. The method of or claim 1 , wherein the plasma sample is obtained from the subject following administration of iodide to the subject.4. The method of or claim 1 , wherein the plasma sample is obtained from the subject prior to the administration of iodide to the subject.5. The method of any of - claim 1 , wherein the subject is diagnosed with or at risk of hypoxia claim 1 , ischemia or reperfusion injury.6. The method of any of - claim 1 , wherein the subject is diagnosed with or at risk of stroke claim 1 , heart attack claim 1 , or blood loss.7. The method of any of - claim 1 , wherein the subject is undergoing or is scheduled to undergo cell claim 1 , tissue claim 1 , or organ transplantation.8. The method of any of - claim 1 , wherein the ion chromatography comprises conductivity detection.9. The method of any of - claim 1 , wherein the ion chromatography comprises UV/VIS detection.10. The method of any of - claim 1 , wherein the ion chromatography comprises amperometry.11. The method of any of - claim 1 , wherein the ion chromatography can detect a concentration of the iodide below 5 parts per million in a plasma sample.12. The method of any of - claim 1 , wherein the ion chromatography can detect a concentration of the iodide that is between about 0.001 and about 500 parts per billion.13. The method of any of - ...

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23-04-2015 дата публикации

MULTIELECTRODE ELECTROLYTIC DEVICE AND METHOD

Номер: US20150111305A1
Принадлежит: Dionex Corporation

An electrolytic device comprising: a central sample flow channel, first and second regenerant flow channels, first and second charged barriers disposed between said sample flow channel and first and second regenerant flow channels, and pairs of oppositely charged, spaced electrodes disposed in the regenerant flow channels. Also, electrolytic devices with a different electrode configuration are described. Also, methods of using the devices, e.g., for suppression in an ion chromatography system are described. 1. An electrolytic device comprising:(a) a sample flow channel having an inlet and an outlet;(b) a first regenerant flow channel having an inlet and an outlet;(c) a first charged barrier having exchangeable ions capable of passing ions of one charge, positive or negative, and of blocking bulk liquid flow, disposed between said sample flow channel and first regenerant flow channel; and(d) a first pair of first and second spaced electrodes disposed in said first regenerant flow channel.2. The electrolytic device of further comprising(e) a second regenerant flow channel having an inlet and an outlet;(f) a second charged barrier having exchangeable ions capable of passing ions of one charge, positive or negative; and of blocking bulk liquid flow, disposed between said sample flow channel and said second regenerant flow channel; and(g) a second pair of third and fourth spaced electrodes disposed in said second regenerant flow channel.3. The electrolytic device of in which the exchangeable ions of the second charged barrier are of the same charge claim 2 , positive or negative claim 2 , as the exchangeable ions of the first charged barrier.4. The electrolytic device of further comprising a third pair of spaced electrodes in said first regenerant flow channel forming a first array with said first pair of spaced electrodes claim 2 , and a fourth pair of spaced electrodes in said second regenerant flow channel forming a second array with said second pair of spaced ...

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29-04-2021 дата публикации

METHODS FOR PREPARING MODIFIED VON WILLEBRAND FACTOR

Номер: US20210121535A1
Принадлежит:

The present invention provides modified von Willebrand Factor molecules, methods for their preparation and uses thereof. The invention further provides pharmaceutical compositions for treating coagulation disorders. 121.-. (canceled)22. A glycoprotein comprising a truncated von Willebrand Factor (VWF) , wherein the truncated VWF is capable of binding to a Factor VIII (FVIII) , and wherein the glycoprotein comprises N-glycans , wherein i) at least 75% of the N-glycans comprise at least one sialic acid moiety , ii) less than 35% of the N-glycans comprise two or more terminal and non-sialylated galactose residues , and/or iii) less than 6% of the N-glycans comprise three or more terminal and non-sialylated galactose residues23. The glycoprotein of claim 22 , wherein at least 70% of the N-glycans comprise at least one α-2 claim 22 ,6-sialic acid moiety or at least one α-2 claim 22 ,3-sialic acid moiety.24. The glycoprotein of claim 22 , wherein at least 80% of the N-glycans comprise at least one sialic acid moiety.25. The glycoprotein of claim 22 , wherein at least 85% of the N-glycans comprise at least one sialic acid moiety.26. The glycoprotein of claim 22 , wherein the truncated VWF comprises (a) amino acids 776 to 805 of SEQ ID NO:9 claim 22 , or (b) an amino acid sequence having at least 90% sequence identity to amino acids 776 to 805 of SEQ ID NO:9.27. The glycoprotein of claim 22 , wherein the truncated VWF consists of (a) amino acids 776 to 805 of SEQ ID NO:9 claim 22 , or (b) an amino acid sequence having at least 90% sequence identity to amino acids 764 to 1242 of SEQ ID NO:928. The glycoprotein of claim 22 , wherein the truncated VWF comprises (a) amino acids 764 to 1242 of SEQ ID NO:9 claim 22 , or (b) an amino acid sequence having at least 90% sequence identity to amino acids 764 to 1242 of SEQ ID NO:9.29. The glycoprotein of claim 22 , wherein the truncated VWF consists of (a) amino acids 764 to 1242 of SEQ ID NO:9 claim 22 , or (b) an amino acid sequence ...

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20-04-2017 дата публикации

MASS SPECTROMETRY METHOD FOR ORGANIC ACID, ANALYTICAL COLUMN AND ANALYTICAL DEVICE

Номер: US20170108474A1
Принадлежит: SHOWA DENKO K.K.

A mass spectrometry method by a liquid chromatograph-mass spectrometer that can detect an organic acid with high sensitivity by retaining, separating and eluting the organic acid without adding any nonvolatile substance to a mobile phase and without receiving any restriction of a ratio of a water-soluble organic solvent, and an analytical column are provided. The mass spectrometry method is a mass spectrometry method for an organic acid by a liquid chromatograph-mass spectrometer, wherein a column packed with a hydrophilic polymer having an anion-exchange group is used, and as a mobile phase, a water-soluble organic solvent-water mixed solution is used. The analytical column is a column for liquid chromatography for an organic acid, in which a polyether ether ketone (PEEK) resin housing for liquid chromatography is packed with a hydrophilic polymer having an anion-exchange group. 1. A mass spectrometry method for an organic acid by liquid chromatography-mass spectrometry using a liquid chromatograph-mass spectrometer , wherein a column using , as a packing material , a hydrophilic polymer having an anion-exchange group is used , and as a mobile phase , a water-soluble organic solvent-water mixed solution is used.2. The mass spectrometry method for an organic acid as claimed in claim 1 , wherein a base material of the hydrophilic polymer having an anion-exchange group is polyvinyl alcohol.3. The mass spectrometry method for an organic acid as claimed in claim 1 , wherein the anion-exchange group of the hydrophilic polymer having an anion-exchange group is a quaternary ammonium group claim 1 , and the content of the quaternary ammonium group is 0.01 to 0.1 meq based on 1 g of the hydrophilic polymer.4. The mass spectrometry method for an organic acid as claimed in claim 1 , wherein the water-soluble organic solvent-water mixed solution is a solution containing the water-soluble organic solvent in an amount of 50 to 95% in terms of volume ratio.5. The mass spectrometry ...

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20-04-2017 дата публикации

Conductivity detector and ion chromatography system including the same

Номер: US20170108476A1

A conductivity detector includes a flow channel, an electrode arrangement, and a detector. The flow channel has a tube shape with a channel diameter through which a solution including ion components flows. The electrode arrangement is on the flow channel and includes at least an anode and at least a cathode. The anode and cathode are spaced apart by an electrode gap less than or equal to the channel diameter. The detector is connected to the electrode arrangement to detect electrical conductivity of the ion components.

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11-04-2019 дата публикации

FAST STARTUP ION CHROMATOGRAPHY SYSTEM AND METHODS

Номер: US20190107518A1
Принадлежит:

Systems and methods for inhibiting translocation of ions across ion exchange barriers include an eluent generator having an ion source reservoir with a first electrode, an eluent generation chamber with a second electrode, an ion exchange barrier disposed therebetween, and means for reversing the polarity of a voltage or current applied across the first and second electrodes. A first polarity voltage or current applied across the electrodes generates an electric field that promotes translocation of eluent counter ions from the reservoir across the barrier, where the counter ions combine with eluent ions electrolytically generated in the chamber. By reversing the polarity of the voltage or current across the electrodes, the resulting electric field inhibits translocation of counter ions across the barrier from the reservoir into the chamber. Reverse voltage or current bias reduces counter ion concentration in the resting chamber to prevent exhaustion of ion suppressor capacity during start up. 1. A method of inhibiting translocation of an eluent through an ion exchange barrier of an ion exchange chromatography system , the method comprising:applying a voltage or current across a first electrode and a second electrode, the voltage or current having a first polarity, the first electrode being disposed on a first side of the ion exchange barrier, the second electrode being disposed on a second side of the ion exchange barrier, the applied voltage or current with the first polarity electrolytically generating eluent ions at the second electrode and to generate a first electric field to promote the translocation of eluent counter ions through the ion exchange barrier from the first side to the second side, wherein the eluent counter ions and eluent ions combine to form the eluent; andselectively reversing the polarity of the voltage or current from the first polarity to a second polarity to generate a second electric field that inhibits translocation of the eluent through ...

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26-04-2018 дата публикации

SCREENING ASSAYS BASED ON MAG AND/OR ABHD6 FOR SELECTING INSULIN SECRETION PROMOTING AGENT

Номер: US20180113115A1
Принадлежит:

The present application relates to a method of characterizing an agent's ability to increase insulin secretion in a subject. The method comprises determining whether the agent is able to modulate MAG level at the inner surface of the cytoplasmic membrane of a cell and/or ABHD6 activity. The agent is characterized as having the ability to increase insulin secretion in the subject when it is capable of upregulating MAG level at the inner surface of the cytoplasmic membrane and/or downregulating ABHD6 activity. 1. A method of characterizing an agent's ability to increase glucose-stimulated insulin secretion in a subject , said method comprising:(a) combining the agent with a pancreatic β cell expressing a ABHD6 polypeptide, in the presence of at least 10 mM of glucose;(b) determining a test value of the lipase activity specific for the ABHD6 polypeptide of the pancreatic β cell in the presence of the agent and of glucose, wherein the test value is obtained by measuring, in the pancreatic β cell, a test level of intracellular monoacyl glycerol (MAG), a test level of extracellular glycerol and a test level of extracellular free fatty acid;(c) providing a control value of the lipase activity of the ABHD6 polypeptide, wherein the control value is associated with a lack of ability to increase insulin secretion in the subject and wherein the control value comprises a control level of intracellular MAG, a control level of extracellular glycerol and a control level of extracellular free fatty acid;(d) comparing the test value of step (b) to the control value of step (c); and i. having the ability to increase glucose-stimulated insulin secretion in the subject when the test level of intracellular MAG is increased with respect to the control level of intracellular MAG, the test level of extracellular glycerol is decreased with respect to the control level of extracellular glycerol and the test level of extracellular free fatty acid is decreased with respect to the control level ...

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09-06-2022 дата публикации

MODIFYING MESSAGES STORED IN MIXTURES OF MOLECULES USING THIN-LAYER CHROMATOGRAPHY

Номер: US20220180083A1
Принадлежит:

Storage media are provided. A substrate has an array of addressable locations thereon, each addressable location adapted to be physically associated with a collection of molecules, each collection comprising at least a first subcollection of molecules and a second subcollection of molecules. The molecules in the collection are selected from a set of unambiguously identifiable molecules, the set comprising at least a first subset of molecules and a second subset of molecules. Each molecule in the first subset is identifiable by a first physical property, and each molecule in the second subset is identifiable by a second physical property, different from the first physical property. Each molecule in the set is uniquely associated with a predetermined position in a numerical value, wherein the presence of the molecule in the collection indicates a predetermined digit at the associated position and the absence of said molecule in the collection indicates a zero at said associated position. 1. A machine-readable medium comprising:a substrate having an array of addressable locations thereon, each addressable location adapted to be physically associated with a collection of molecules, each collection comprising at least a first subcollection of molecules and a second subcollection of molecules,wherein the molecules in the collection are selected from a set of unambiguously identifiable molecules, the set comprising at least a first subset of molecules and a second subset of molecules;wherein each molecule in the first subset is identifiable by a first physical property, and each molecule in the second subset is identifiable by a second physical property, different from the first physical property; andwherein each molecule in the set is uniquely associated with a predetermined position in a numerical value, wherein the presence of the molecule in the collection indicates a predetermined digit at the associated position and the absence of said molecule in the collection ...

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03-05-2018 дата публикации

IONIC STRENGTH-MEDIATED PH GRADIENT ION EXCHANGE CHROMATOGRAPHY

Номер: US20180120273A1
Принадлежит:

The present invention provides methods for analyzing compositions of polypeptides such as antibodies by ionic strength-mediated pH gradient ion exchange chromatography. In some aspects, the methods use a combination of pH gradients and ionic strength gradients to separate the polypeptide from charge variants of the polypeptide. In some aspects, the methods use a stable ionic strength to optimize the pH gradient separation window to separate the polypeptide from charge variants. Such methods are useful for analyzing polypeptide, e.g. antibodies, with a pI greater than 9 or a pI less than 7. In some aspects, the invention provides a multiproduct method for the analysis of polypeptides of varying pI's. 1. A method for analyzing a composition comprising a polypeptide and one or more contaminants , the method comprisinga) binding the polypeptide and one of more contaminants to an ion-exchange chromatography material using a loading buffer, wherein the loading buffer is at a first pH and comprises a first ionic strength;b) eluting the polypeptide and one or more contaminants from the ion-exchange chromatography material using an elution buffer wherein the pH of the elution buffer is altered in a pH gradient and the ionic strength of the elution buffer is altered in an ionic strength gradient, wherein the polypeptide and the one or more contaminants are separated by the combination of pH gradient and ionic strength gradient; andc) detecting the polypeptide and the one or more contaminants.2. The method of claim 1 , wherein the polypeptide is an antibody or immunoadhesin or fragment thereof.3. The method of claim 1 , wherein the polypeptide is a monoclonal antibody or fragment thereof.4. The method of claim 2 , wherein the antibody is a human antibody.5. The method of claim 2 , wherein the antibody is a humanized antibody.6. The method of claim 2 , wherein the antibody is a chimeric antibody.7. The method of claim 2 , wherein the antibody is an antibody fragment.8. The ...

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25-08-2022 дата публикации

CYCLIC GERMANIUM COMPOUNDS AND APPLICATIONS THEREOF

Номер: US20220267358A1
Принадлежит:

The present disclosure provides a new series of compounds exhibiting high fluorescence quantum yields in the solid state. In one embodiment, the compounds include a series of 2,3,4,5-tetraphenylgermoles with the same or different 1,1-substituents. In another embodiment, substituted germafluorenes, germa-fluoresceins/rhodamines, and germapins are described. These germanium heterocycles possess ideal photophysical and thermostability properties, which makes them excellent candidates for chemical or biological sensors, host materials for electroluminescent devices and solar cells, and emissive and/or electron-transport layer components in organic light emitting diode devices. 2. The compound of claim 1 , wherein Rand Rare each phenyl.3. The compound of claim 1 , wherein Rand Rare each phenyl.7. The compound of claim 6 , wherein Rand Rare each methyl.8. The compound of claim 6 , wherein Ris H.9. The compound of claim 6 , wherein Ris selected from the group consisting of CH claim 6 , p-CHCH claim 6 , and p-CHOCH. This divisional application claims priority to U.S. patent application Ser. No. 16/369,752, filed on Mar. 29, 2019, which is a divisional application of U.S. patent application Ser. No. 14/406,777, filed on Dec. 10, 2014, which is a National Stage Entry of International Application Number PCT/US2013/045201, filed on Jun. 11, 2013, U.S. Provisional Patent Application No. 61/690,456, filed on Jun. 26, 2012, and U.S. Provisional Patent Application No. 61/689,723, filed on Jun. 11, 2012, the disclosures of which are hereby expressly incorporated by reference in their entireties.This invention was made with Government support under the Grant No. CHE-0719380 awarded by the National Science Foundation. The Government has certain rights in the invention.The present disclosure relates to compounds for use as luminescent materials and, most specifically, as luminescent materials that exhibit high fluorescence quantum yields in the solid state. The compounds are ideal ...

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04-05-2017 дата публикации

Methods and Materials for Determination of Distribution Coefficients for Separation Materials

Номер: US20170122875A1
Принадлежит:

Methods and materials for determining the affinity of separation materials for targeted species are described. A composite separation medium is described that combines a separation material such as an ion exchange material or a sorbent with an SERS substrate. Methods and materials can be utilized to determine the distribution coefficient of a species for a separation material after running a single separation protocol followed by examination of the separation material of the protocol according to SERS. Disclosed methods can be utilized to determine the affinity of existing separation materials for targeted species as well as to determine the affinity of newly engineered separation materials to characterize species. 1. A method for determining the distribution coefficient of a species for a separation material comprising:contacting a solution comprising the targeted species at a known concentration with a composite separation medium, the composite separation medium including a separation material and an SERS substrate, the SERS substrate including metal nanoparticles, wherein upon the contact, a portion of the targeted species becomes retained on the composite separation medium; andfollowing the contact, examining the composite separation medium according to an SERS process to determine the concentration of the targeted species retained on the composite separation medium and thereby determine the distribution coefficient of the targeted species for the separation material.2. The method of claim 1 , wherein the separation material is an ion exchange material.3. The method of claim 2 , wherein the separation material is an anion exchange material.4. The method of claim 1 , wherein the targeted species comprises actinides or strontium.5. The method of claim 1 , wherein the metal nanoparticles are gold nanoparticles.6. The method of claim 1 , wherein the composite separation medium includes the metal nanoparticles at a surface of the separation material.7. The method of ...

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12-05-2016 дата публикации

ION GENERATION USING MODIFIED WETTED POROUS MATERIALS

Номер: US20160131621A1
Принадлежит:

The invention generally relates to ion generation using modified wetted porous materials. In certain aspects, the invention generally relates to systems and methods for ion generation using a wetted porous substrate that substantially prevents diffusion of sample into the substrate. In other aspects, the invention generally relate to ion generation using a wetted porous material and a drying agent. In other aspects, the invention generally relates to ion generation using a modified wetted porous substrate in which at least a portion of the porous substrate includes a material that modifies an interaction between a sample and the substrate. 129-. (canceled)30. A system for analyzing a sample material comprising:at least one porous substrate connected to a voltage source, wherein the porous substrate comprises a material that substantially prevents diffusion of a sample into the substrate; anda mass analyzer.31. The system according to claim 30 , wherein the porous substrate is discrete from a flow of solvent.32. The system according to claim 30 , wherein the porous substrate is silanized paper.3334-. (canceled)35. The system according to claim 30 , further comprising a solvent applied to the substrate claim 30 , wherein the solvent is capable of diffusing into the substrate.36. The system according to claim 35 , wherein the solvent assists transport of the sample through the substrate.37. The system according to claim 36 , wherein the solvent contains an internal standard.3841-. (canceled)42. The system according to claim 30 , wherein the mass analyzer is for a mass spectrometer or a handheld mass spectrometer.43. (canceled)44. A method for analyzing a sample comprising:contacting a sample to a porous substrate, wherein the porous substrate comprises a material that substantially prevents diffusion of the sample into the substrate;applying a solvent that is capable of diffusing into the substrate to the sample, resulting in diffusion of components of the sample into ...

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11-05-2017 дата публикации

Minimal Spanning Trees for Extracted Ion Chromatograms

Номер: US20170131247A1
Автор: GAZIS Paul R.
Принадлежит:

A method for generating an extracted ion chromatogram (XIC) from mass spectrometry data is disclosed. Mass spectrometry data are received comprised of a plurality of data points, each data point representing a measured ion intensity at a mass to charge ratio at a chromatographic retention time and these data are filtered to produce a filtered dataset. A minimal spanning tree is then generated connecting the data points of the filtered dataset and tree branches are pruned in accordance with a specified length threshold to yield one or more sub-trees. The sub-trees are then interpreted as a set of XICs and displayed on a display device. 1. A method of generating an extracted ion chromatogram from mass spectrometry data comprising:(a) receiving the mass spectrometry data comprising a plurality of data points, each data point representing a measured ion intensity at a mass to charge ratio at a chromatographic retention time;(b) filtering the mass spectrometry data to produce a filtered dataset;(c) generating a minimal spanning tree connecting data points of the filtered dataset;(d) pruning branches in the minimal spanning tree that exceed a specified length threshold to yield at least one sub-tree; and,(e) interpreting the at least one sub-tree as a set of extracted ion chromatograms.2. The method of claim 1 , wherein the step of filtering the mass spectrometry data includes determining the maximum observed intensity claim 1 , multiplying this by a relative intensity threshold to determine an absolute intensity threshold claim 1 , and discarding points with intensities less than the absolute intensity threshold.3. The method of further comprising plotting the data points in the filtered data set in two dimensions claim 1 , a retention time dimension and a m/z dimension.4. The method of claim 3 , further comprising applying a scaling factor to the m/z dimension or to the retention dimension.5. The method of claim 1 , wherein the step of generating a minimal spanning tree ...

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11-05-2017 дата публикации

AUTOMATED SAMPLING SYSTEM

Номер: US20170131319A1
Принадлежит:

The automated sampling system has a water tight case that encloses a testing instrument. In the preferred embodiment, the testing instrument is a field-portable ion chromatography instrument designed to test water samples. In operation, a controller directs a syringe pump to draw fluid from outside the system through a specialized filter with a continuous flow lower reservoir. When directed by the controller, the syringe pump then injects the sample water into a testing portion of the field-portable ion chromatography instrument. 1. An auto-sampling system for a testing instrument , the system comprising:a watertight outer shell;a control unit enclosed within the shell;a syringe pump in communication with the control unit; (a) an unfiltered reservoir having an inlet and an outlet so that the unfiltered reservoir comprises a continuous flow reservoir;', '(b) a filtered reservoir smaller than the unfiltered reservoir; and,', '(c) a filter element positioned between the filtered reservoir and the unfiltered reservoir; a syringe pump having a plunger;, 'a sample inlet filter in hydraulic communication with the syringe pump, the inlet filter comprisinga check valve positioned between the syringe pump and the inlet filter;wherein the system is structured so that, when directed by the control unit, a plunger of the syringe pump is retracted and suction force from the syringe pump causes sample fluid to move from the unfiltered reservoir into the filtered reservoir and through the check valve, when further directed by the control unit, the plunger is advanced, so that the a sample fluid is injected back through the check valve and into a testing portion of an instrument.2. The system of wherein the system comprises an auto-sampling system for a field-portable ion chromatography instrument.3. The system of further comprising an inline digester in hydraulic communication with the syringe pump and the inlet filter.4. The system of wherein the inline digester boils sample fluid ...

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01-09-2022 дата публикации

METHOD FOR DIRECTLY DETECTING PATHOGENIC STRAIN HAVING RESISTANCE TO BETA-LACTAM ANTIBIOTICS

Номер: US20220276211A1
Принадлежит:

The present invention relates to a method for detecting a pathogenic strain having resistance to β-lactam antibiotics in a biological sample, and a method for identifying a protein involved in resistance in β-lactam antibiotics, which is contained in a biological sample. According to the present invention, it is possible to quickly and accurately determine not only whether a pathogenic strain has resistance to antibiotics, but also the type of protein involved in the resistance, by directly identifying an extended spectrum β-lactamase (ESBL) protein with a truncated N-terminus through mass spectrometry. Accordingly, the present invention can be effectively utilized to quickly establish an appropriate antibiotic administration strategy at the initial stage of infection. 1. A method of detecting a pathogenic strain having resistance to β-lactam antibiotics in a biological sample , comprising:(a) isolating a protein expressed by a pathogenic strain in a biological sample isolated from a subject; and(b) performing top-down mass spectrometry on the isolated protein,wherein it is determined that the pathogenic strain having resistance to β-lactam antibiotics is present in the biological sample, when a protein having the same mass as β-lactamase from which 28 amino acid residues at the N-terminus thereof have been removed is detected as a result of the mass spectrometry.2. The method of claim 1 , further comprising performing ion exchange chromatography on the protein isolated in step (a).3. The method of claim 2 , wherein the ion exchange chromatography is anion exchange chromatography.4. The method of claim 1 , wherein the β-lactamase is CTX-M protein.5. The method of claim 4 , wherein the CTX-M protein is at least one protein selected from the group consisting of CTX-M1 to CTX-M7 claim 4 , CTX-M9 claim 4 , CTX-M10 claim 4 , CTX-M12 to CTX-M17 claim 4 , CTX-M19 to CTX-M24 claim 4 , CTX-M27 to CTX-M38 claim 4 , CTX-M40 to CTX-M44 claim 4 , CTX-M46 to CTX-M56 claim 4 , CTX ...

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19-05-2016 дата публикации

ION EXCHANGE BASED VOLATILE COMPONENT REMOVAL DEVICE FOR ION CHROMATOGRAPHY

Номер: US20160137530A1
Принадлежит:

A method, device, and system for removing a volatile component from a liquid solution for a chromatographic separation are described. The method includes the flowing of a liquid solution through a first chamber of the device. A volatile component in the liquid solution is transported across a first ion exchange barrier from the first chamber to a second chamber. The first ion exchange barrier has a first charge. The second chamber includes an ion exchange packing having a second charge that is an opposite polarity to the first charge. The volatile component reacts with the ion exchange packing to create a charged component in the second chamber. The charged component having a third charge that is a same polarity to the first charge. The ion exchange packing is regenerated by electrolytically generating a hydronium or a hydroxide. 1. A method of removing a volatile component from a liquid solution for a chromatographic separation , the method comprising:flowing the liquid solution, that comprises the volatile component, through a first chamber;transporting the volatile component across a first ion exchange barrier from the first chamber to a second chamber, where the first ion exchange barrier is at least partially disposed between the first chamber and the second chamber, in which the first ion exchange barrier has a first charge, allows the flow of ions having a charge opposite to the first charge, and does not allow bulk flow of the liquid solution, and the second chamber including an ion exchange packing having a second charge that is an opposite polarity to the first charge;reacting the volatile component with the ion exchange packing to create a charged component in the second chamber, the charged component having a third charge that is a same polarity to the first charge, regenerating the ion exchange packing by electrolytically generating a hydronium or a hydroxide, in which the hydronium or the hydroxide is in electrical communication with the ion exchange ...

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03-06-2021 дата публикации

Method and system for controlling preparative liquid chromatography

Номер: US20210164948A1
Принадлежит: Interchim SAS, Intrchim SA

The invention relates to a method for controlling preparative liquid chromatography, comprising the following steps, at least a part of said steps being implemented by a computer comprising a processor and a display screen coupled to said processor:(a) selecting an analytical liquid chromatography method from among thin layer chromatography (TLC) and high performance liquid chromatography (HPLC),(b) inputting analytical liquid chromatography data obtained by the method selected at step (a) for a product to be purified,(c) accessing a table of separating tools available to the user to implement said preparative liquid chromatography,(d) from said analytical liquid chromatography data and table of available separating tools, selecting an optimal separating tool from said table and computing preparative liquid chromatography operating conditions for said selected separating tool.

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03-06-2021 дата публикации

VIAL CAP AND METHOD FOR REMOVING MATRIX COMPONENTS FROM A LIQUID SAMPLE

Номер: US20210164949A1
Принадлежит:

A vial cap for removing a matrix component from a liquid sample is described. The vial cap includes a cap body, an inlet portion, and an outlet portion. The cap body is configured to have a slidable gas and liquid seal with a side wall of a sample vial. The inlet portion includes a counterbore section that holds a filter plug. The filter plug includes a polyethylene resin and a material selected from the group consisting of an ion exchange material and a reversed-phase material. The vial cap is adapted for solid phase extraction for use in an autosampler with a plurality of sample vials. 1. A vial cap for removing a matrix component from a liquid sample and transferring the liquid sample in a sample vial to an injection valve at the same time , the vial cap comprising:a cap body including a liquid sample passageway, and an outer periphery configured to have a slidable gas and liquid seal with a side wall of a sample vial, the sample vial including a side wall, a bottom wall, and an inlet opening;an inlet portion configured to receive a pressurized liquid sample from the sample vial where the liquid sample flows into the liquid sample passageway, the inlet portion including a counterbore section, the counterbore section holding a filter plug, the filter plug comprising high density polyethylene resin particles fused together with a material selected from the group consisting of an ion exchange material and a reversed-phase material, the material physically entrapped within a void volume in the fused high density polyethylene;an outlet portion configured to output the liquid sample from the liquid sample passageway that has passed through the filter plug, the outlet portion including a plunger section configured to receive a downward force into a sample vial to pressurize the liquid sample within the sample vial.2. The vial cap of claim 1 , in which the reversed-phase material is configured to bind an ion pairing agent in a salt form claim 1 , an acid form claim 1 , ...

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18-05-2017 дата публикации

Ion exchange foams to remove ions from samples

Номер: US20170136465A1
Принадлежит: Dionex Corp

A method of making an ion exchange foam is described. The method includes forming an aqueous phase by suspending an ion exchange resin in an aqueous solvent. An organic phase is formed by mixing at least a divinylbenzene, a monomer, and a surfactant. The formed aqueous phase is mixed with the formed organic phase to form an emulsion. The emulsion is polymerized to form the ion exchange foam. The ion exchange foam can be used with a plurality of sample vials in an autosampler.

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17-05-2018 дата публикации

SUPPRESSOR SYSTEM, AND METHOD FOR DETERMINING LIFE OF ION EXCHANGE RESIN COLUMN

Номер: US20180136176A1
Принадлежит:

The suppressor system is provided with: a suppressor which has an eluent flow path and a suppression solution flow path, the eluent flow path and the suppression solution flow path being separated from each other by an ion exchange membrane; a circulation flow path which connects the inlet and the outlet of the suppression solution flow path of the suppressor, and circulates a suppression solution; an ion exchange resin column which is provided on the circulation flow path, and is equipped with a resin accommodation unit through which the suppression solution flowing out of the suppressor is passed, an acidic or alkaline ion exchange resin being accommodated in the resin accommodation unit; and a life detector which determines the life of the ion exchange resin in the ion exchange resin column. 1. A suppressor system comprising:a suppressor having an eluent flow path through which an eluent flows and a suppression solution flow path through which a suppression solution flows, the eluent flow path and the suppression solution flow path being provided so as to be separated by an ion exchange membrane;a circulation flow path that connects an inlet and an outlet of the suppression solution flow path of the suppressor to circulate the suppression solution;an ion exchange resin column provided on the circulation flow path and including a resin accommodation unit through which the suppression solution flowing out of the suppressor flows and an acidic or alkaline ion exchange resin accommodated in the resin accommodation unit; anda life detector configured to determine a life of the ion exchange resin in the ion exchange resin column.2. The suppressor system as recited in claim 1 , whereina light transmitting portion that changes in optical transparency according to a volume change of the ion exchange resin in the resin accommodation unit is provided at an upper end portion of the resin accommodation unit of the ion exchange resin column, andthe life detector includes a ...

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09-05-2019 дата публикации

ION EXCHANGE STATIONARY PHASES FOR ANALYZYING POLYVALENT IONS

Номер: US20190134621A1
Автор: Pohl Christopher A.
Принадлежит:

Ion exchange stationary phases are prepared with diprimary diamines for applications such as separating samples that contain polyvalent anions. The ion exchange stationary phase includes a series of condensation polymer reaction products bound to a substrate. The condensation polymer products are formed with diprimary diamines and polyepoxide compounds. The ion exchange stationary phases described herein are capable of separating monovalent and highly polyvalent anions relatively quickly with relatively low eluent concentrations in one chromatographic run. 1. An ion exchange stationary phase comprises:a) a negatively charged substrate particle; i) at least a first diprimary diamine, and', 'ii) at least a first polyepoxide compound;, 'b) a first condensation polymer reaction product attached to the negatively charged substrate particle, the first condensation polymer reaction product of'} i) at least an amine group of the first condensation polymer reaction product, and', 'ii) at least a second polyepoxide compound, in which the amine group of the first condensation polymer reaction product includes a positive charge so that the first condensation polymer reaction product is ionically coupled to the negatively charged substrate particle;, 'c) a second condensation polymer reaction product covalently attached to the first condensation polymer reaction product, the second condensation polymer reaction product of'} i) at least an epoxide group of the second condensation polymer reaction product, and', 'ii) at least a second diprimary diamine,, 'd) a third condensation polymer reaction product covalently attached to the second condensation polymer reaction product, the third condensation polymer reaction product of'} i) at least an amine group of the third condensation polymer reaction product, and', 'ii) at least a third polyepoxide compound; and, 'e) a fourth condensation polymer reaction product covalently attached to the third condensation polymer reaction product, ...

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30-04-2020 дата публикации

DEVELOPMENT CHAMBERS FOR THIN LAYER CHROMATOGRAPHY AND METHODS OF MAKING AND USING THE SAME

Номер: US20200132643A1
Автор: Kerr Robert Ralph
Принадлежит:

Development chambers suitable for use in thin layer chromatography are disclosed. Methods of making and using development chambers in thin layer chromatography are also disclosed. 114. A development chamber comprising:{'b': 30', '21, 'a chamber base member having a base member upper surface ; and'}{'b': 16', '30', '22', '16', '21', '30', '25', '14, 'a chamber body that extends above said chamber base member such that one or more inner wall surfaces of said chamber body and said base member upper surface of said chamber base member at least partially surround a chamber volume of said development chamber ,'}{'b': 21', '30', '23', '21', '23', '111', '11', '17', '23', '16', '124', '16, 'sub': 'A', 'wherein said base member upper surface of said chamber base member comprises a well extending below and into said base member upper surface , said well having (a) well dimensions that (i) enable a bottom end of a thin layer chromatography (TLC) plate to be positioned therein, and (ii) house at least a portion of a mobile phase/solvent when inputted into said well , and (b) a maximum well cross-sectional area Wthat is less than 80% of a maximum interior cross-sectional area of said chamber body extending substantially parallel with an open end of said chamber body .'}214. A development chamber comprising:{'b': 30', '21, 'a chamber base member having a base member upper surface ; and'}{'b': 16', '30', '22', '16', '21', '30', '25', '14, 'a chamber body that extends above said chamber base member such that one or more inner wall surfaces of said chamber body and said base member upper surface of said chamber base member at least partially surround a chamber volume of said development chamber ,'}{'b': 21', '30', '23', '21', '23', '111', '11', '17', '23, 'sub': 'V', 'wherein said base member upper surface of said chamber base member comprises a well extending below and into said base member upper surface , said well having (a) well dimensions that (i) enable a bottom end of a thin ...

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24-05-2018 дата публикации

Sampling pumps and closed loop control of sampling pumps to load traps

Номер: US20180140970A1
Принадлежит: PerkinElmer Health Sciences, Inc.

Certain configurations of devices and systems which are configured to draw a selected volume of an air sample into a trap are described. In some examples, the devices and systems comprise a pump and a mass flow sensor to draw a selected volume of the air sample through a trap even where variable restriction occurs.

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25-05-2017 дата публикации

Non-diffusive botulinum toxin causing local muscle paralysis, and purification method thereof

Номер: US20170143849A1
Принадлежит: Medexgen Inc

The present invention relates to a method for purifying a non-spreading botulinum toxin that causes local muscle paralysis and a non-spreading botulinum toxin obtained thereby. The method comprises the steps of: subjecting a purified botulinum toxin type A product to ion-exchange chromatography using a controlled pH of buffer, concentration of sodium chloride (NaCl), thereby separating the botulinum toxin type A product into subfractions; and collecting a subfraction having an A260/A280 value in a specific range from the separated subfractions.

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02-06-2016 дата публикации

Inspection tool for nucleic acid chromatography

Номер: US20160153031A1
Принадлежит: NGK Insulators Ltd

An inspection tool for nucleic acid chromatography includes an elongated porous sheet and a backing member. The porous sheet has a surface including a detection surface that has a strip-shaped indication portion where a nucleic acid probe for capturing the target nucleic acid is fixed. The backing member has an attached surface in a concave shape. The porous sheet has a warped shape following the concave shape of the attached surface.

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17-06-2021 дата публикации

ELECTROLYTIC ELUENT GENERATORS WITH STABILIZED OPERATING VOLTAGES

Номер: US20210178334A1
Принадлежит:

An electrolytic eluent generator includes an electrolyte reservoir, an eluent generation chamber, and an ion exchange membrane stack. The electrolyte reservoir includes a chamber containing an aqueous electrolyte solution including an electrolyte and a surfactant; and a first electrode. The eluent generation chamber including a second electrode. The ion exchange connector includes an ion exchange membrane stack, and a compression block. 1. An electrolytic eluent generator comprising: a chamber containing an aqueous electrolyte solution including an electrolyte and a surfactant; and', 'a first electrode;, 'an electrolyte reservoir includingan eluent generation chamber including a second electrode; and an ion exchange membrane stack; and', 'a compression block., 'an ion exchange connector including2. The electrolytic eluent generator of wherein the eluent generation chamber is configured to operate at a pressure of up to about 15 claim 1 ,000 psi.3. The electrolytic eluent generator of wherein the second electrode is a perforated electrode.4. The electrolytic eluent generator of wherein the compression block is disposed between the electrolyte reservoir and the ion exchange membrane stack claim 1 , and the compression block includes a plurality of channels.5. The electrolytic eluent generator of wherein the surfactant is an anionic surfactant and the ion exchange membrane stack has a net negative charge and is configured to allow cation flow through and to block anions and bulk liquid flow or cationic surfactant and the ion exchange membrane stack has a net positive charge and is configured to allow anion flow through and to block cations and bulk liquid flow.6. The electrolytic eluent generator of wherein the surfactant is a non-ionic surfactant.7. The electrolytic eluent generator of wherein the surfactant is a caustic and acid stable surfactant.8. A method comprising:providing an aqueous electrolyte solution to an electrolyte reservoir, the aqueous electrolyte ...

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11-06-2015 дата публикации

Double-sided Diaphragm Micro Gas-preconcentrator with a Back-on-face Configuration

Номер: US20150160172A1
Принадлежит:

A double-sided diaphragm micro gas-preconcentrator has a micro-gas chamber which is formed by stacking an upper silicon substrate with a lower silicon substrate with a back-on-face configuration. One or more suspended membranes are provided on every silicon substrate. The silicon where the suspended membrane is provided is completely removed for forming a cavity. A thin-film heater is deposited on every suspended membrane. A sorptive film is coated on an inner wall of every suspended membrane. Thus, the upper and lower sides of the preconcentrator in the present invention are suspended membranes, which improve the area of the sorptive film on the diaphragm. As a result, the preconcentrating factor is improved while keeping the small heat capacity, fast heating rate, and low power consumption features of the planar diaphragm preconcentrator. 1. A double-sided diaphragm micro gas-preconcentrator with a back-on-face configuration , comprising:a base silicon substrate having a first suspended membrane on a front side and a first cavity on a back side of the base silicon substrate;a cover silicon substrate having a second suspended membrane on a front side, and a second cavity, an air inlet and an air outlet on a back side of the cover silicon substrate;two thin-film heaters respectively disposed on a front side of the first and second suspended membranes;a first sorptive film coated on the front side of the first suspended membrane of the base silicon substrate; anda second sorptive film coated on the back side of the second suspended membrane of the cover silicon substrate,wherein a micro-gas chamber is formed by stacking the cover silicon substrate on the base silicon substrate with a back-on-face configuration and bonding as a whole.2. The double-sided diaphragm micro gas-preconcentrator claim 1 , as recited in claim 1 , wherein the suspended membrane is a film of silicon nitride or silicon oxynitride or silicon oxide or SiN/SiOmultilayer.3. The double-sided ...

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11-06-2015 дата публикации

THIN LAYER CHROMATOGRAPHY PLATES AND RELATED METHODS

Номер: US20150160173A1
Принадлежит:

In an embodiment, a method for manufacturing a thin layer chromatography (“TLC”) plate is disclosed. The method includes forming a layer of elongated nanostructures (e.g., carbon nanotubes), and at least partially coating the elongated nanostructures with a coating including silicon nitride. At least a portion of the elongated nanostructures may be removed after being coated. The silicon nitride of the coating may be at least partially oxidized to form silicon dioxide. 1. A method for manufacturing a thin layer chromatography plate , the method comprising:forming a catalyst layer disposed on a substrate that includes a first portion and at least a second portion, each of the first and at least a second portions exhibiting a selected non-linear configuration;forming a layer of elongated nanostructures on the first and at least a second portions of the catalyst layer, wherein the layer of elongated nanostructures includes a first portion grown on the first portion of the catalyst layer and at least a second portion grown on the at least a second portion of the catalyst layer;at least partially coating the elongated nanostructures with a coating including silicon nitride;after at least partially coating the elongated nanostructures with a coating, at least partially removing the elongated nanostructures; andafter at least partially coating the elongated nanostructures with a coating, at least partially oxidizing the silicon nitride of the coating to form silicon dioxide.2. The method as recited in claim 1 , wherein the coating that at least partially coats the elongated nanostructures defines respective elongated structures that extend longitudinally away from the substrate.3. The method as recited in claim 1 , wherein the catalyst layer includes iron claim 1 , nickel claim 1 , copper claim 1 , cobalt claim 1 , alloys thereof claim 1 , or combinations thereof.4. The method as recited in claim 1 , wherein the substrate includes a backing layer on which the catalyst ...

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07-06-2018 дата публикации

METHODS FOR PREPARING MODIFIED VON WILLEBRAND FACTOR

Номер: US20180153968A1
Принадлежит:

The present invention provides modified von Willebrand Factor molecules, methods for their preparation and uses thereof. The invention further provides pharmaceutical compositions for treating coagulation disorders. 1. A method of producing a glycoprotein comprising N-glycans that have increased sialylation , wherein the method comprises (i) providing cells comprising a nucleic acid sequence encoding a polypeptide comprising a truncated von Willebrand Factor (VWF) , and (ii) culturing the cells at a temperature of less than 36.0° C.2. The method of claim 1 , wherein the method produces a dimer of the glycoprotein VWF claim 1 , or wherein the method increases dimerization of the glycoprotein.3. The method of claim 1 , wherein the cells further comprise a recombinant nucleic acid sequence encoding a sialyltransferase.4. The method of claim 1 , wherein prior to (ii) the cells are cultured at a temperature of 37.0° C.±1.0° C. claim 1 , and during (ii) the cells are cultured at a temperature of 34.0° C.±2.0° C.5. A method of producing a glycoprotein comprising N-glycans that have increased sialylation claim 1 , wherein the method comprises (i) providing cells comprising (a) a nucleic acid sequence encoding a polypeptide comprising a truncated von Willebrand Factor (VWF) and (b) a recombinant nucleic acid sequence encoding an α-2 claim 1 ,6-sialyltransferase claim 1 , and (ii) culturing the cells under conditions that allow expression of the glycoprotein and the α-2 claim 1 ,6-sialyltransferase.6. The method of claim 1 , further comprising (i) subjecting the glycoprotein to ion exchange chromatography claim 1 , whereby fractions of glycoprotein with high sialylation are separated from fractions of glycoprotein with low sialylation; and collecting the fractions having high sialylation; or (ii) contacting the glycoprotein with a sialyltransferase and a sialic acid donor in vitro.7. The method of claim 1 , wherein at least 75% of the N-glycans on the glycoprotein comprise at ...

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09-06-2016 дата публикации

ELUCIDATION OF ION EXCHANGE CHROMATOGRAPHY INPUT OPTIMIZATION

Номер: US20160161455A1
Принадлежит:

The present invention provides methods for determining chromatography separation conditions; for example, separation of a polypeptide and its charge variants. The invention also provides methods to determine a buffer condition for chromatography separation conditions. The invention also provides a robust method to analyze multiple polypeptide products. 1. A method for identifying an optimal ion exchange chromatography separation condition to analyze a plurality of compositions , wherein each composition comprises a polypeptide with and one or more contaminants , the method comprisinga) plotting a net charge versus pH curve at a selected temperature based on the amino acid composition of the polypeptides of two or more of the compositions, andb) determining the inflection point of the net charge versus pH curve at or near neutral pH by determining the second derivative of the plots of step a);wherein the optimal ion exchange chromatography separation condition is a pH at about a common inflection point for the polypeptide(s) of one or more of the compositions.2. The method of claim 1 , wherein if the net charge at the inflection point is positive claim 1 , a cation exchange material is used for the ion exchange chromatography.3. The method of claim 2 , wherein the cation exchange chromatography material is a sulfonated chromatography material or a carboxylated chromatography material.4. The method of claim 1 , wherein if the net charge at the inflection point is negative claim 1 , an anion exchange material is used for the chromatography.5. The method of claim 4 , wherein the anion exchange chromatography material is a quarternary amine chromatography material or a tertiary amine chromatography material.6. The method of claim 1 , wherein a mixed mode chormatography material is used for the chromatography.7. The method of claim 6 , wherein the mixed mode ion exchange material is a mixture of sequentially packed sulfonated chromatography material or carboxylated ...

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08-06-2017 дата публикации

Radial chromatography for carbohydrate separation

Номер: US20170157532A1
Принадлежит: Cargill, Incorporated

The invention relates to a process for separating one or more carbohydrate from a composition wherein separating is done through radial chromatography. Preferably, the invention relates to a process for separating at least two carbohydrates from a composition wherein separating is done through radial chromatography, and wherein each of the at least two carbohydrates are collected in a purified form. The present invention relates to the use of radial chromatography for the separation of one or more carbohydrate from a composition and obtaining the one or more carbohydrate in a purified form.

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14-05-2020 дата публикации

ION SUPPRESSOR AND ION CHROMATOGRAPH

Номер: US20200147518A1
Автор: Sakamoto Katsumasa
Принадлежит: SHIMADZU CORPORATION

An ion suppressor includes ion exchange membranes between a pair of electrodes. Regeneration liquid channels are provided in the spaces between the electrodes and the ion exchange membranes, and an eluent channel is provided between the ion exchange membranes. Ion re-exchange in the eluent on the downstream side of the eluent channel is suppressed, thereby making it possible to improve the detection sensitivity for the ion to be measured. For example, the eluent channel has a folded structure, thereby increasing the amount of current on the downstream side of the eluent channel, and thus, the accumulation of ions is suppressed, and accordingly, ion re-exchange in the eluent can be suppressed. 113-. (canceled)14. An ion suppressor , comprising:the ion suppressor that exchanges ions in an eluent from a separation column of an ion chromatograph,wherein a first ion exchange membrane and a second ion exchange membrane are disposed between a pair of electrodes of a first electrode and a second electrode,an eluent channel for allowing passage of the eluent from the separation column of the ion chromatograph is provided in a space between the first ion exchange membrane and the second ion exchange membrane,a first regeneration liquid channel for allowing passage of a regeneration liquid that regenerates the first ion exchange membrane is provided in a space between the first electrode and the first ion exchange membrane,a second regeneration liquid channel for allowing passage of a regeneration liquid that regenerates the second ion exchange membrane is provided in a space between the second electrode and the second ion exchange membrane, andthe eluent channel has a folded structure, where an introduction part for introducing the eluent from the separation column into the eluent channel and a discharge part for discharging the eluent from the eluent channel are disposed close to each other.15. The ion suppressor according to claim 14 , wherein a third ion exchange membrane ...

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18-06-2015 дата публикации

CYCLIC GERMANIUM COMPOUNDS AND APPLICATIONS THEREOF

Номер: US20150166581A1
Принадлежит:

The present disclosure provides a new series of compounds exhibiting high fluorescence quantum yields in the solid state. In one embodiment, the compounds include a series of 2,3,4,5-tetraphenylgermoles with the same or different 1,1-substituents. In another embodiment, substituted germafluorenes, germa-fluoresceins/rhodamines, and germapins are described. These germanium heterocycles possess ideal photophysical and thermostability properties, which makes them excellent candidates for chemical or biological sensors, host materials for electroluminescent devices and solar cells, and emissive and for electron-transport layer components in organic light emitting diode devices, This application claims priority to International Application Number PCT/US2013/045201, filed on Jun. 11, 2013, U.S. Provisional Patent Application No. 61/690456, filed on Jun. 26, 2012, and U.S. Provisional Patent Application No. 61/689,723, filed on Jun. 11, 2012, the disclosures of which are hereby expressly incorporated by reference in their entireties.This invention was made with Government support under Grant No. CHE-0719380 awarded by the National Science Foundation. The Government has certain rights in the invention.The present disclosure relates to compounds for use as luminescent materials and, most specifically, as luminescent materials that exhibit high fluorescence quantum yields in the solid state. The compounds are ideal candidates for a variety of applications, including for use as electron-transporting or emissive layers in semiconducting and electronic, devices and as chemical and biological sensors. In one particular embodiment., the compounds are used as chemosensors for the detection of volatile organic compounds (VOCs) such as acetone.For the past few decades, the development of efficient luminescent materials, having desirable optoelectronic properties, has been a topic of great interest. The development of efficient luminescent materials, however, has been hindered by ...

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04-09-2014 дата публикации

Thin-layer chromatography plate

Номер: US20140248196A1
Принадлежит: Daicel Corp

An object of the present invention is to provide a TLC plate which allows separation and detection of target substances on one plate. Provided is a TLC plate comprising a substrate, a separating medium layer stacked on the substrate, and a permeation layer stacked on the separating medium layer and allowing permeation of a target substance separated in the separating medium layer, wherein the separating medium layer has separating property for the target substance and optical responsiveness for ultraviolet rays, and the permeation layer has optical responsiveness different from that of the separating medium layer.

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15-06-2017 дата публикации

ION GENERATION USING MODIFIED WETTED POROUS MATERIALS

Номер: US20170168032A1
Принадлежит:

The invention generally relates to ion generation using modified wetted porous materials. In certain aspects, the invention generally relates to systems and methods for ion generation using a wetted porous substrate that substantially prevents diffusion of sample into the substrate. In other aspects, the invention generally relate to ion generation using a wetted porous material and a drying agent. In other aspects, the invention generally relates to ion generation using a modified wetted porous substrate in which at least a portion of the porous substrate includes a material that modifies an interaction between a sample and the substrate. 1. A system for analyzing a sample material comprising:at least one porous substrate connected to a high voltage source, wherein the porous substrate comprises a drying agent; anda mass analyzer.290-. (canceled)91. The system according to claim 1 , wherein the porous substrate is discrete from a flow of solvent.92. The system according to claim 1 , wherein the mass analyzer is for a mass spectrometer or a handheld mass spectrometer.93. The probe according to claim 1 , wherein the porous material is paper or PVDF membrane.94. The probe according to claim 93 , wherein the paper is filter paper.95. The probe according to claim 1 , wherein the drying agent is an anhydrous salt.96. The probe according to claim 1 , further comprising an internal standard.97. A method for analyzing a sample comprising:contacting a sample to a porous substrate, wherein the porous substrate comprises a drying agent;applying a high voltage to the porous material to generate ions of an analyte in the sample that are expelled from the porous material; andanalyzing the expelled ions.98. The method according to claim 97 , wherein the porous substrate is kept separate from a flow of solvent.99. The method according to claim 97 , further comprising applying a solvent to the porous material.100. The method according to claim 99 , wherein the solvent assists in ...

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21-05-2020 дата публикации

SEPARATION METHOD USING AN ION EXCHANGER AND A DRAW SOLUTION COMPRISING ADSORBER PARTICLES

Номер: US20200158704A1
Автор: Ahmed Imad
Принадлежит:

A method for separating ionic species from an analyte solution to form a fractionated sample, the method comprising contacting the analyte solution with an ion-exchanger that is selectively permeable to ionic species of either a positive or negative charge, contacting an opposing side of the ion-exchanger with a draw solution, wherein the draw solution comprises adsorber particles dispersed in a liquid carrier, establishing a concentration gradient across the ion-exchanger to allow at least some ionic species from the analyte solution to permeate through the ion-exchanger to the draw solution, adsorbing ionic species that permeate from the analyte solution onto the adsorber particles, separating adsorber particles having the ionic species adsorbed thereto from at least part of the draw solution, and eluting the ionic species from the separated adsorber particles to form a fractionated analyte sample comprising eluted ionic species. 1. A method for separating ionic species from an analyte solution to form a fractionated sample , the method comprisingcontacting the analyte solution with an ion-exchanger that is selectively permeable to ionic species of either a positive or negative charge,contacting an opposing side of the ion-exchanger with a draw solution, wherein the draw solution comprises adsorber particles dispersed in a liquid carrier,establishing a concentration gradient across the ion-exchanger to allow at least some ionic species from the analyte solution to permeate through the ion-exchanger to the draw solution,adsorbing ionic species that permeate from the analyte solution onto the adsorber particles,separating adsorber particles having the ionic species adsorbed thereto from at least part of the draw solution, andeluting the ionic species from the separated adsorber particles to form a fractionated analyte sample comprising eluted ionic species.2. A method as claimed in claim 1 , wherein the adsorber particles are magnetic particles.3. A method as ...

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23-06-2016 дата публикации

ION PROCESSING DEVICE, ION CHROMATOGRAPH PROVIDED WITH THE ION PROCESSING DEVICE, AND ELUENT GENERATOR PROVIDED WITH THE ION PROCESSING DEVICE

Номер: US20160175778A1
Автор: OIKAWA Yukio
Принадлежит: SHIMADZU CORPORATION

An ion processing device includes, on the side of an anion exchange layer of a bipolar membrane which is formed by stacking an anion exchange layer and a cation exchange layer, an anion-side channel which is filled with an anion exchanger, and an anion removal channel provided via an anion exchange membrane, and also includes an anode for moving anions from the anion-side channel to the anion removal channel through the anion exchange membrane. Further, a cation-side channel which is filled with a cation exchanger and a cation removal channel provided via a cation exchange membrane are included on the side of the cation exchange layer of the bipolar membrane as well as a cathode for moving cations from the cation-side channel to the cation removal channel through the cation exchange membrane. 1. An ion processing device comprising:a bipolar membrane that is formed by stacking an anion exchange layer and a cation exchange layer;an anion-side channel that is arranged in contact with the anion exchange layer of the bipolar membrane, and that is filled with an anion exchanger;an anion removal channel that is arranged in contact with the anion-side channel via an anion exchange membrane;an anode for moving anions from the anion-side channel to the anion removal channel through the anion exchange membrane;a cation-side channel that is arranged in contact with the cation exchange layer of the bipolar membrane, and that is filled with a cation exchanger;a cation removal channel that is arranged in contact with the cation-side channel via a cation exchange membrane; anda cathode for moving cations from the cation-side channel to the cation removal channel through the cation exchange membrane.2. The ion processing device according to claim 1 , further comprising a channel branching section for dividing and introducing a liquid from one channel into the anion-side channel and the cation-side channel.3. An ion chromatograph comprising:a separation column for separating a sample ...

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06-06-2019 дата публикации

TEST DEVICE

Номер: US20190168209A1
Принадлежит: KANEKA CORPORATION

A test device includes a housing and a lid. The housing encloses an internal space, has a hole supporting a container accommodating liquid, and includes a perforation/incision part. The lid covers a hole-formed part of the housing. The housing and/or the lid includes a guide that guides the housing and the lid, so that the lid can migrate from the first position to the second position while covering the hole-formed part of the housing. In the first position, the lid covers the hole-formed part of the housing and the container and the container is not incised. During the migration of the lid from the first position to the second position, the container is pushed toward the perforation/incision part by the lid, and the container is incised to leak liquid into the internal space. 1. A test device comprising a housing and a lid mounted on the housing ,wherein the housing comprises:at least one hole;a hole-formed part where the at least one hole is formed;an internal space enclosed in the housing where chromatography using a chromatography support is carried out; anda perforation/incision pail provided in the internal space,wherein the internal space is communicated with the outside of the housing through the at least one hole, allowing at least one container accommodating a liquid used for chromatography to be inserted and supported,wherein the perforation/incision part perforates or incises the container to leak the liquid from the container into the internal space,wherein at least either one of the housing or the lid comprises a guide that guides the lid to the housing in a manner such that the lid can migrate from a first position to a second position while covering the hole-formed part of the housing with the lid and supporting the container through the at least one hole,wherein the first position is a position where the lid covers the hole-formed part and an outer portion of the container protruded toward the lid through the at least one hole and the container is ...

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06-06-2019 дата публикации

THIN LAYER CHROMATOGRAPHY PLATE AND SAMPLE ANALYSIS METHOD USING SAME

Номер: US20190170683A1
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Provided is a thin layer chromatography plate that makes it possible to separate a plurality of components from each other more simply and more quickly. Thin layer chromatography plate includes substrate and separation layer that is disposed on substrate for separating multiple components included in a sample from each other. Separation layer has first layer that has a band shape and extends in first development direction and second layer that extends in second development direction orthogonal to first development direction. Second layer is in contact with first layer. First layer includes a hydrophilic porous body. Second layer includes a hydrophobic porous body. 1. A thin layer chromatography plate comprising:a substrate; anda separation layer disposed on the substrate, the separation layer separating multiple components included in a sample from each other,whereinthe separation layer has a first layer that has a band shape and extends in a first development direction and a second layer that extends in a second development direction orthogonal to the first development direction,the second layer is in contact with the first layer,the first layer includes a hydrophilic porous body, andthe second layer includes a hydrophobic porous body.2. The thin layer chromatography plate according to claim 1 , whereinthe first layer and the second layer are both disposed on the substrate, anda lateral surface of the first layer and a lateral surface of the second layer are in contact with each other.3. The thin layer chromatography plate according to claim 1 , whereinthe separation layer further has a third layer in contact with the second layer,the first layer, the second layer, and the third layer are arrayed in sequence in the second development direction,the third layer includes a porous body, andat least one requirement selected from among a requirement of a composition of the third layer being different from a composition of the second layer and a requirement of a structure ...

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06-06-2019 дата публикации

Thin layer chromatography plate and sample analysis method using same

Номер: US20190170713A1

The thin layer chromatography plate includes a substrate and a separation layer. The separation layer is disposed on the substrate and is configured to separate multiple components included in a sample from each other. The separation layer includes a first layer and a second layer. The first layer has a porous structure and extends in a first direction. The second layer has a porous structure and extends in the first direction. The first layer and the second layer are arrayed in a second direction orthogonal to the first direction. A zeta potential of the first layer is different from a zeta potential of the second layer.

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