Gas chromatography system and gas chromatography method for exhaled gas

A chromatographic analysis and chromatographic column technology, which is applied in the direction of analyzing materials, material separation, measuring devices, etc., can solve the problem that multiple components cannot be detected at the same time

Pending Publication Date: 2021-09-10
必睿思(杭州)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] An object of the present invention is to provide a method for detecting the exhaled breath samples in order to solve the defect that the existing equipment for exhaled breath detection only targets a specific component, but cannot detect multiple components at the same time, and the detection time exceeds 3 minutes. An exhaled gas chromatographic analysis system with simultaneous gas chromatographic analysis of hydrogen, methane, carbon monoxide and carbon dioxide, and a detection time of less than 3 minutes;

Method used

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  • Gas chromatography system and gas chromatography method for exhaled gas
  • Gas chromatography system and gas chromatography method for exhaled gas
  • Gas chromatography system and gas chromatography method for exhaled gas

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Embodiment

[0045] The present embodiment uses the above-mentioned analysis system to provide a gas chromatography analysis method for exhaled gas, comprising the following steps:

[0046] Step 1, sampling the exhaled sample to obtain sample I, with a volume of 0.5-3mL;

[0047] Step 2, the exhaled gas sample is sampled through the ten-way pneumatic switching valve. After the sampling is completed, the valve is switched, and then injected into the quantitative tube. , the measured gaseous components flow out; after 0.5min, the through valve switches back to the initial state again (this process is the regeneration process, the purpose: to remove the water vapor remaining in column 1), backwash column 1, and remove the water vapor remaining in column 1 Drain it by backflushing, and the time of column 1 forward blowing and backflushing is the same to achieve the purpose of accurate water removal;

[0048] Step 3: Divide the sample flowing out of the column 1 into two paths through the tee ...

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Abstract

The invention relates to a gas chromatography system and a gas chromatography method for exhaled gas, which are used for simultaneously carrying out gas chromatography on hydrogen, methane, carbon monoxide and carbon dioxide in an exhaled gas sample and have the detection time of less than 3 minutes, when gas chromatography is carried out on hydrogen, methane, carbon monoxide and carbon dioxide in the exhaled gas sample, high-content carbon dioxide is removed through valve switching, the purpose of detecting extremely low-content methane and carbon monoxide is achieved, and meanwhile it is guaranteed that a base line is stable. According to the invention, high-content carbon dioxide and extremely-low-content methane and carbon monoxide are independently analyzed through two detections, so that the requirement of rapid analysis (the detection time is shorter than 3 minutes) is met, the influence of high-concentration carbon dioxide trailing on the separation degree of methane and carbon monoxide is also ensured, and efficient separation analysis is ensured.

Description

technical field [0001] The invention belongs to the field of gas chromatographic analysis methods, and in particular relates to an exhaled gas chromatographic analysis system and analysis method for simultaneously performing gas chromatographic analysis on hydrogen, methane, carbon monoxide and carbon dioxide in an exhaled gas sample, and the detection time is less than 3 minutes. Background technique [0002] Compared with the inhaled gas, the composition of people's exhaled gas has obvious changes, which are manifested in: oxygen decreases by 4-5%, carbon dioxide increases by 4-5%, and the content of water vapor also increases by about 5%. In addition, some traces of carbon monoxide, nitric oxide (NO), methanol, ethanol, hydrogen, etc. are added to the exhaled air. The composition of the exhaled gas changes because the gas exchange between the inhaled gas and the lung cells and the respiratory tract directly produce a specific gas composition. By measuring the composition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88G01N30/14
CPCG01N30/88G01N30/14G01N2030/025G01N2030/8813
Inventor 郝雷赵伟军周伟汪小知张厚德段兴斌
Owner 必睿思(杭州)科技有限公司
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