公开(公告)号：EP2619548A4

公开(公告)日：2018-01-17

申请号：EP11827521

申请日：2011-09-22

Applicant: LI-COR INC

Inventor： JOHNSON MARK A ,  PARR ANDREW S ,  ECKLES ROBERT D

IPC: G01N21/3504 ,  G01N21/05 ,  G01N21/37 ,  G01N21/84 ,  G01N33/00 ,  G01N33/24 ,  G01N33/497

CPC classification number: G01N33/0009 ,  B33Y70/00 ,  B33Y80/00 ,  G01N21/05 ,  G01N21/3504 ,  G01N33/004 ,  G01N33/0098 ,  G01N2021/8466

Abstract: 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. The gas exchange analysis system includes a sample chamber having an inlet and an outlet, wherein the internal surface(s) of the chamber defining the measurement volume are metal plated. The system also typically includes 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 the metal plated internal surface(s) of the chamber reduces sorption of the one or more gases within the chamber.

公开(公告)号：WO2012040439A3

公开(公告)日：2012-06-14

申请号：PCT/US2011052724

申请日：2011-09-22

Applicant: LI COR INC ,  JOHNSON MARK A ,  PARR ANDREW S ,  ECKLES ROBERT D

Inventor： JOHNSON MARK A ,  PARR ANDREW S ,  ECKLES ROBERT D

IPC: G01N21/37 ,  G01N33/00 ,  G01N33/24

CPC classification number: G01N33/0009 ,  B33Y70/00 ,  B33Y80/00 ,  G01N21/05 ,  G01N21/3504 ,  G01N33/004 ,  G01N33/0098 ,  G01N2021/8466

Abstract: 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.

Abstract translation: 系统流路设计，尽量减少气体扩散源和水槽的影响。 通过减少寄生源和汇的幅度，可以更准确地测量较低的光合作用和蒸腾速率，例如，不需要广泛的经验补偿。 根据一个方面，一种气体交换分析系统包括：样本室，其限定用于分析样品的测量体积，所述样品室具有入口和出口;以及位于所述样品室附近的分流机构，所述机构被配置为 将从输入端口接收的气流从远程源分解到第一输出端口和第二输出端口，其中第一输出端口与样品室的入口耦合。 限定测量体积的室的内表面可以是金属镀覆的。 该系统还可以包括与样品室的入口耦合的气体源和与样品室的出口耦合的气体分析器，并且被配置为测量离开室的一种或多种气体的浓度，由此金属镀覆的内表面 s）可以减少腔室内的一种或多种气体的吸附，以及与分流机构的第二输出端口耦合并被配置成测量一种或多种气体的浓度的第二气体分析器。 有利的是，由于流动分离机构与样品室和气体分析仪以及金属镀层的接近，气体扩散源和水槽被减少。