Chinese parasol bacteristatic and its processing method

Method for determining content of formaldehyde in water-based adhesive for cigarettes

The invention belongs to the technical field of tobacco, and particularly discloses a method for determining the content of formaldehyde in a water-based adhesive for cigarettes. The method comprises the steps of: diluting a sample of the water-based adhesive for the cigarettes and extracting the formaldehyde in the sample of the water-based adhesive for the cigarettes by water; derivatizing 2,4-dinitrophenylhydrazine; using acetonitrile for volume fixation; obtaining formaldehyde-2,4-dinitrophenylhydrazone sample solution; equipping a diode array detector with a high performance liquid chromatograph; and quantificationally determining the content of the formaldehyde in the sample of the water-based adhesive for the cigarettes by an external reference method, wherein chromatographic conditions are that: a C18 chromatographic column is taken as a stationary phase, water and the acetonitrile are taken as a mobile phase, and the mobile phase comprises the components in percentage by volume ...

Method for determining content of formaldehyde in water-based adhesive for cigarettes

The invention belongs to the technical field of tobacco, and particularly discloses a method for determining the content of formaldehyde in a water-based adhesive for cigarettes. The method comprises the steps of: diluting a sample of the water-based adhesive for the cigarettes and extracting the formaldehyde in the sample of the water-based adhesive for the cigarettes by water; derivatizing 2,4-dinitrophenylhydrazine; using acetonitrile for volume fixation; obtaining formaldehyde-2,4-dinitrophenylhydrazone sample solution; equipping a diode array detector with a high performance liquid chromatograph; and quantificationally determining the content of the formaldehyde in the sample of the water-based adhesive for the cigarettes by an external reference method, wherein chromatographic conditions are that: a C18 chromatographic column is taken as a stationary phase, water and the acetonitrile are taken as a mobile phase, and the mobile phase comprises the components in percentage by volume ...

Chinese parasol bacteriostatic and its processing method

The natural bacteriostatic agent is obtained by using the bark of Chinese parasol as raw material and through washing, stoving, crushing, cohobation extraction and concentration. It contains anthraquinone, flavonoid, triterpenoid, and sterol with certain bacteriostatic activity and strong anti-mould activity.

Method for detecting cigarette mainstream flue gas benzo(a) pyrene by gel infiltration-GC/MS method

The invention provides a method for detecting the benzo[a]pyrene in the main stream smoke of cigarette using gel permeation-GC-MS. The cambridge filter disc is dismounted from the smoking machine and mounted into a cone flask with plug and then is subjected to ultrasonic extraction in ultrasonic after adding cyclohexane. The extract liquid is moved into a GPC sample bottle and is leached using the cyclohexane-ethyl acetate mixed liquor and the leaching liquid is collected and concentrated in an automatic concentrating device. The internal standard solution is added into the concentrated liquid and analyzed by GC -MS apparatus to quantitate based on component peak area and internal standard peak area. The condition of the GC-MS is that: DB-5MS capillary chromatographic column; split stream or not split stream sampling; N2 as carrier gas; temperature of the injection port:230-260 degree; temperature programming. The invention has high automaticity, friend environment, easy operation, less ...

Method for detecting cigarette mainstream flue gas benzo(a) pyrene by gel infiltration-GC/MS method

The invention provides a method for detecting the benzo[a]pyrene in the main stream smoke of cigarette using gel permeation-GC-MS. The cambridge filter disc is dismounted from the smoking machine and mounted into a cone flask with plug and then is subjected to ultrasonic extraction in ultrasonic after adding cyclohexane. The extract liquid is moved into a GPC sample bottle and is leached using the cyclohexane-ethyl acetate mixed liquor and the leaching liquid is collected and concentrated in an automatic concentrating device. The internal standard solution is added into the concentrated liquid and analyzed by GC -MS apparatus to quantitate based on component peak area and internal standard peak area. The condition of the GC-MS is that: DB-5MS capillary chromatographic column; split streamor not split stream sampling; N₂ as carrier gas; temperature of the injection port:230-260 degree; temperature programming. The invention has high automaticity, friend environment, easy operation ...