Gas exchange system flow configuration
Номер патента: EP2619548A2
Опубликовано: 31-07-2013
Автор(ы): Andrew S. Parr, Mark A. Johnson, Robert D. Eckles
Принадлежит: Li Cor Inc
Опубликовано: 31-07-2013
Автор(ы): Andrew S. Parr, Mark A. Johnson, Robert D. Eckles
Принадлежит: Li Cor Inc
Реферат: System flow path designs that minimize the impact of gas diffusion sources and sinks. By reducing the magnitude of parasitic sources and sinks, lower rates of photosynthesis and transpiration can be more accurately measured, e.g., without the need for extensive empirical compensation. According to one aspect, a gas exchange analysis system includes a sample chamber defining a measurement volume for analysis of a sample, the sample chamber having an inlet and an outlet, and a flow splitting mechanism located proximal to the sample chamber, the mechanism configured to split a gas flow received at an input port from a remote source to a first output port and to a second output port, wherein the first output port is coupled with the inlet of the sample chamber. The internal surface(s) of the chamber defining the measurement volume can be metal plated. The system also can include a source of gas coupled with the inlet of the sample chamber and a gas analyzer coupled with the outlet of the sample chamber and configured to measure a concentration of one or more gases exiting the chamber, whereby metal plated internal surface(s) of the chamber can reduce sorption of the one or more gases within the chamber, and a second gas analyzer coupled with the second output port of the flow splitting mechanism and configured to measure a concentration of the one or more gases. Advantageously, gas diffusion sources and sinks are reduced due to the proximity of the flow splitting mechanism with the sample chamber and gas analyzers as well as the metal plating.
Gas exchange system flow configuration
Номер патента: WO2012040439A2. Автор: Mark A. Johnson,Robert D. Eckles,Andrew S. Parr. Владелец: LI-COR, INC.. Дата публикации: 2012-03-29.