Portable gas chromatography-mass spectrometry linkage device

Abstract

The invention belongs to the technical field of gas or volatile sample separation and analysis and particularly provides a portable gas chromatography-mass spectrometry linkage device. The device is divided into a gas chromatography module, an ionization source module and a mass spectrometry detector module; the gas chromatography module comprises a gasification chamber, a column oven and a gas chromatographic column; the ionization source module comprises an ion source and an ion lens; the detector module comprises an ion transmission device and a mass analyzer. The centers of the three modules are located on the same axis, the gas chromatography module is connected with the ion source, and the ionization source module is connected with the ion transmission device of the mass spectrometry detector module through the ion lens. According to the portable gas chromatography-mass spectrometry linkage device, mass spectrometry negative pressure is utilized, air serves as carrier gas, the device is simplified, the weight is reduced, and it is more convenient to achieve vehicle mounting or miniaturization for site survey; sample feeding and carrier gas switching processes are achieved through a three-way valve, the structure is simple, and it is convenient to feed samples quantitatively; the device can be effectively used for real-time detection and analysis of gas samples or volatile samples, and industrial utilization value is achieved.

Description

technical field [0001] The invention belongs to the technical field of separation and analysis of gaseous or volatile samples, and in particular relates to a portable gas chromatography-mass spectrometry device. Background technique [0002] With the improvement of people's quality of life and the acceleration of the pace of life, more and more problems need to be solved by real-time surveys, especially in food safety, gas safety, water quality safety, public security detection and other issues, which are particularly urgent. However, for some gas samples and more volatile samples, it is difficult to realize on-site detection by using traditional small-scale liquid chromatography-mass spectrometry technology. If conventional gas chromatography is used for on-site detection, it is very inconvenient to carry a carrier gas cylinder, and the sensitivity of the detector is also difficult to achieve the detection purpose. [0003] Gas chromatography-mass spectrometry is a high-se...

AI Technical Summary

Problems solved by technology

However, gas chromatography-mass spectrometry usually cannot be miniaturized like liquid chromatography-mass spectrometry. One of the important reasons is that it is inseparable from the gas cylinder used to provide carrier gas. This problem severely limits Progress in Miniaturization of Gas Chromatography

At the same time, due to this problem, it is difficult for gas chromatography-mass spectrometry to be used in field surveys.

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