Ion mobility spectrometer

A technology of ion mobility spectrometer and ion mobility tube, which is applied to the parts of particle separator tubes, sample introduction/extraction, etc., can solve the problems of unfavorable detection of trace substances, complicated installation and replacement, high detection limit, etc., and achieve simple The effect of efficient detection

Inactive Publication Date: 2019-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0003] For gas sampling, a membrane sampling device is generally used. The installation and replacement of the membrane sampling device is co

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  • Ion mobility spectrometer
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[0009] In one aspect of the present invention, an ion mobility spectrometer is provided, which includes an ionization source 1, a dust filter 8, a sampling pump 2, an ionization zone 17, a reaction zone 18, and a migration zone 19 arranged in sequence along the migration tube. A plate-shaped microporous electrode 3 is arranged between 17 and the reaction zone 18. Plate-shaped microporous electrode The original plate-shaped electrode with a through hole in the middle, where 0.1≤the aperture of the through hole≤3mm. Opposite gas inlet 9 and gas outlet 20 are provided on the side wall surface of ionization zone 17. Gas outlet 20 is connected to the atmosphere via air pump 2, and gas inlet 9 is connected to the gas source of the sample port or to the atmosphere via dust filter device 8. For sample collection. The reaction zone 18 and the migration zone 19 are separated by an ion gate 11.

[0010] The ion transfer tube near the Faraday disk 15 is provided with a bleaching gas inlet ...

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Abstract

The invention provides an ion mobility spectrometer which comprises a filtering device, an ionization source, an air pump and an electrode. A microporous electrode is arranged in the ionization zone to control the internal gas flow in a migration tube, since micropores form large gas resistance, when airflow in the ionization zone flows, the impact on a migration zone is small, and therefore, theimpact of air pressure on the migration tube is reduced.

Description

technical field [0001] The invention relates to a detection device for detecting toxic and harmful gases by using ion mobility spectrum technology, which belongs to the technical field of safety detection, and specifically relates to an ion mobility spectrum, which can effectively detect gas substances. Background technique [0002] Spectrum consists of sample injection part, ionization part, ion gate, migration area, collection area, data acquisition and processing, control and other parts. [0003] For gas sampling, a membrane sampling device is generally used. The installation and replacement of the membrane sampling device is complicated, and the permeation efficiency is low, so the detection limit is high, which is not conducive to the detection of trace substances. The present invention solves the above existing problems. Contents of the invention [0004] The object of the present invention is to provide a method for detecting gas, which improves the sampling and d...

Claims

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Application Information

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IPC IPC(8): H01J49/04
Inventor 李东明仓怀文李京华李海洋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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