Gas chromatography multichannel sample introduction system and realized atmosphere detection method thereof

Abstract

The invention relates to a gas chromatography multichannel sample introduction system which comprises a chromatographic column A, a shunt, an electronic pressure controller and at least two gas phase detectors, wherein the chromatographic column A is connected with the shunt; the gas phase detectors are mutually connected in parallel to the shunt; the electronic pressure controller is connected with the shunt; the introduced samples are conveyed to the chromatographic column A to be separated and then are conveyed to the shunt; and according to the shunt, the separated samples are divided into at least two paths to be conveyed to each path of corresponding gas phase detectors to be detected under the action of the electronic pressure controller. The invention also relates to an atmosphere detection method realized by the gas chromatography multichannel sample introduction system. The system disclosed by the invention has the advantage that multi-component compounds can be analyzed by virtue of single sample introduction, the analysis speed is high, the arrangement is flexible, and the system belongs to the technical field of gas detection.

Description

technical field [0001] The invention relates to a gas detection technology, in particular to a gas chromatography multi-channel sampling system and an atmospheric detection method realized therefor. Background technique [0002] Although the content of volatile organic compounds in the atmosphere is small (generally part per billion and part per trillion or lower), they play an extremely important role in the chemical process of the atmosphere and are important to some regional or global climate and environmental issues. There are many kinds of volatile organic compounds in the atmosphere, including non-methane hydrocarbons, halogenated hydrocarbons, sulfur-containing compounds, volatile organic compounds containing oxygen, nitrogen and silicon. [0003] In the prior art, the research on most of the volatile organic compounds in the atmosphere is basically taking samples in the field and sending them back to the laboratory for analysis, so the amount of samples collected on ...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the research on most of the volatile organic compounds in the atmosphere is basically sampling in the field and sending them back to the laboratory for analysis, so the amount of samples collected on site is limited

However, the current analysis method is to analyze a small number of compounds in one sample, so a gas detection technology that can analyze multiple components in one sample is needed

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