Self-headspace gas chromatography sample injector

A sample injector, air phase technology, applied in instruments, scientific instruments, measuring devices, etc., can solve problems such as rapid discharge of samples that cannot be sampled, reduced activity of sampled objects, and improper protection measures.

Pending Publication Date: 2020-04-21
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] However, the existing sampler cannot quickly discharge the sampled material inside the sampler in time when sampling the object, which not only reduces the working efficiency of the sampler, but also reduces the activity of the sampled object, and the protection measures are improper. Moreover, traditional headspace sampling is mainly for gas-liquid or gas-solid mixed samples, and heating technology is used

Method used

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  • Self-headspace gas chromatography sample injector
  • Self-headspace gas chromatography sample injector
  • Self-headspace gas chromatography sample injector

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Embodiment

[0069] Such as Figure 1-7 Shown, the main components of the device of the present invention:

[0070] 1) Control system: mainly includes control panel 1 and single-chip microcomputer 2 (designed and customized based on Hongjing STC12C5A); and control panel 1, motor 26 (planetary gear motor), six-way sampling valve 10, vacuum pump 9, two-way outlet valve 7 , two-way intake valve 8, three-way exhaust valve 6, gas chromatograph 11, needle position probe 21, three-way needle inlet valve 3, three-way needle withdrawal valve 4, upper sliding piece 221 and lower sliding piece 222 respectively with conductive wire It is connected with the single-chip microcomputer 2, and is controlled by the program in the single-chip microcomputer 2. The control panel 1 is connected with the single-chip microcomputer 2 by a flat cable, on which there is a liquid crystal screen to display information and keys to input parameters or commands. The end position probe, the start position probe and the ...

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Abstract

The invention discloses a self-headspace gas chromatography sample injector. The self-headspace gas chromatography sample injector comprises a control system, a gas path system, a positioning system and a bottom plate, wherein the control system includes a control panel and a single chip microcomputer, and the control panel is connected with the single chip microcomputer through a flat cable; thepositioning system includes a sample disc, a gear disc, a motor, an air cylinder, an air cylinder arm, a middle shaft rod and a side shaft rod; and the gas path system includes a three-way needle inlet valve, a three-way needle withdrawing valve, an air pressure stabilizing valve, a two-way gas inlet valve, a flow limiting filter, a six-way sample inlet valve, a two-way gas outlet valve, a three-way exhaust valve, a vacuum pump and a sample inlet needle. Automatic self-headspace sample injection of a gas sample can be realized by combining with gas chromatography.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a headspace gas chromatography sample injector. Background technique [0002] Human activities will emit various gases into the atmosphere, such as air-conditioning refrigerant Freon; sulfur dioxide, hydrogen sulfide, carbon dioxide, and carbon monoxide produced by steelmaking and coal burning; nitrous oxide produced by cement manufacturing or agricultural soil fertilization; rice planting or The methane produced by coal mining will pollute the atmospheric environment, and the prevention and control of air pollution is urgent. Sampling, analyzing and monitoring the discharged polluting gases is the premise of studying gas pollution and carrying out targeted prevention and control. However, the concentration of many gases in the atmosphere is very low, and the sample gas needs to be sampled and sent to a special instrument in the laboratory for analysis. . Glass containers...

Claims

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Application Information

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IPC IPC(8): G01N30/24
CPCG01N30/24
Inventor 万运帆李玉娥高清竹秦晓波王斌万际海干珠扎布胡国铮刘国一王红英陈旋任天婧苗田田
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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