Ion migration tube

Abstract

The invention discloses an ion migration tube. The ion migration tube comprises an ionization source device, an ion reaction device, an ion drifting device, an ion detection device and an outer tube,wherein the ion reaction device, the ion drifting device and the ion detection device are sequentially arranged in the outer tube; the ionization source device is connected with one end of the outer tube by threads, and is jacked against the ion reaction device; the outer casing is connected with the other end of the outer tube by threads, and is jacked against the ion detection device; the ion drifting device consists of insulation rings and electrode rings which are sequentially crossed and arranged; the two adjacent electrode rings are welded and connected together by a voltage division resistor; an ion migration zone is formed in an inner pore space of the insulation rings and electrode rings; the outer tube and the insulation rings of the ion migration tube are made of ceramic material with high heat conductivity. The ion migration tube has the beneficial effects that the sealing structure of the migration tube is improved; the heating rate is increased; the relaxation time is shortened when the positive and negative ion modes of the migration tube are switched; the technology is simplified; the uniformity and reliability of the migration tube are improved.

Description

technical field [0001] The invention relates to an ion transfer tube. Background technique [0002] Ion mobility spectrometry (IMS) technology is a trace chemical analysis technology developed in the 1970s. Ion mobility spectrometry uses the ionization of gas phase molecules and the reaction of ion molecules to generate ions of the substance to be measured, and separates and measures ions according to the difference in ion mobility in the electric field. The principle and method of ion mobility spectrometry are much simpler than commonly used mass spectrometry techniques, and samples can be separated and analyzed under atmospheric pressure, which is suitable for on-site rapid detection and separation. It can be used not only for the detection of gas samples, but also for the detection of liquid samples or even solid samples by thermal analysis methods. The instrument is easy to be portable and has high reliability and low cost. Ion mobility spectrometry is one of the most...

AI Technical Summary

Problems solved by technology

Although there are reports of using glass as an insulating material, it is difficult to form a product due to the difficulty of glass processing

The thermal conductivity of the above insulating materials is relatively poor, and the thermal conductivity is usually only 0.25W / m.K, so that the detection system needs a relatively long heating time after a cold start to reach and stabilize at the required target temperature

This cold start heating time usually takes about 20 minutes, which is not conducive to the rapid start and detection of the instrument on site

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