Portable gas chromatograph used for analysizing trace organics in environmental gas

A gas chromatograph and ambient gas technology, applied in the field of portable gas chromatograph and instrumentation, can solve the problems of great difference in ionization efficiency, difficult to popularize general detectors, short PID life, etc., and achieve light weight and compact instrument. , the effect of low instrument noise

Inactive Publication Date: 2006-06-28
BEIJING MUNICIPAL INST OF LABOUR PROTECTION
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Problems solved by technology

[0010] (1) The volume is still larger and the weight is heavier;
[0011] (2) Most of them use cylinder gas as the carrier gas;
[0012] (3) The column efficiency is low and the separation effect is poor;
[0013] (4) TCD is often used as a detector with low sensitivity;
[0014] (5) Using PID as a detector, the ionization efficiency of different substances varies greatly. Except for BTEX, PID has poor response to other substances, and the PID life is very short, so it is difficult to promote it as a general detector.

Method used

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  • Portable gas chromatograph used for analysizing trace organics in environmental gas
  • Portable gas chromatograph used for analysizing trace organics in environmental gas
  • Portable gas chromatograph used for analysizing trace organics in environmental gas

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Embodiment Construction

[0038] The present invention consists of a carrier gas generation system 3 (electrolyzed water device), a six-way solenoid valve 2, a built-in trace gas sampling pump 1, a micro trap 4, a μFID detector 5-3, a capillary column separation system 5 and a signal amplifier 7, Microcomputer processing system 8 and other parts are used for on-site detection of trace or even ultra-trace organic components in various environmental gases.

[0039] Its working process is divided into steps such as sampling, sample injection, separation, combustion, and signal acquisition and amplification. The sampling process is as follows: after starting up, the carrier gas generation system 3, that is, the water electrolysis device, starts to work to generate hydrogen and oxygen, and the separated hydrogen enters the capillary column separation system 5 through ports 25 and 26 of the six-way solenoid valve 2 as carrier gas. The capillary separation column 5-2 with a length of 15-30 meters, the oxygen ...

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Abstract

A portable gas phase chromatograph used for trace amount analysis of organic material in environmental air is composed of carrier gas system, trapping micro pit, capillary column separation system, micron FID detector, signal collection card and micro processing system. It can be used to carry out quantitative and qualitative analysis on nearly a hundred kinds of organic materials.

Description

technical field [0001] The utility model relates to the technical field of instruments and meters, in particular to the technical field of portable gas chromatography. Background technique [0002] Gas chromatography technology is a technology for separation and analysis based on the volatility and polarity of the components to be separated. Therefore, gas chromatography can qualitatively and quantitatively identify and quantify multi-component organic compounds in mixed samples. The gaseous organic components or the components that volatilize into steam after heating enter the chromatographic separation column and are distributed between the stationary phase and the mobile phase to achieve the purpose of separation. The components that flow out from the tail of the chromatographic column enter the detector Signals are generated for qualitative and quantitative purposes. A traditional gas chromatograph generally includes the following components: (1) carrier gas flow contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 赵寿堂宁占武胡玢丁辉王栋朱佐刚
Owner BEIJING MUNICIPAL INST OF LABOUR PROTECTION
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