Differential ion mobility spectrometry and high field asymmetric waveform ion mobility spectrometry combination device

Abstract

The invention relates to a differential ion mobility spectrometry and high field asymmetric waveform ion mobility spectrometry combination device, which comprises a differential ion mobility spectrometry, a high field asymmetric waveform ion mobility spectrometry and an interface device connecting the differential ion mobility spectrometry and the high field asymmetric waveform ion mobility spectrometry, and is characterized in that the differential ion mobility spectrometry comprises a first substrate, a first gas inlet port, an ion source, an ion source substrate, a second gas inlet port, afirst tail gas port, a first ion selective electrode and a second ion selective electrode, the high field asymmetric waveform ion mobility spectrometry comprises a second substrate, a third gas inletport, a second tail gas port, a first ion separation electrode, a second ion separation electrode, a weak current detection electrode, a weak current detector and a bias electrode, and the interface device is composed of a first traction electrode and a second traction electrode. According to the technical scheme, the device realizes twice separation for differences in spatial position and migration speed of ions of a substance under test, and can realize field detection of the ion mobility spectrometry for pollutants in a complex environment.

Description

technical field [0001] The invention relates to the field of ion mobility spectrometry, in particular to a combined device for differential ion mobility spectrometry and high-field asymmetric waveform ion mobility spectrometry. Background technique [0002] Ion mobility spectrometry is an analytical technique based on the difference in the mobility of gaseous ions, which realizes the separation and identification of ions under the joint action of electric field and flow field. It has the advantages of high sensitivity, simple structure, and fast detection speed. It has been used in explosives, It has a wide range of applications in field fields such as the environment. Ion mobility spectrometry can be divided into many types according to the working mode, among which differential ion mobility spectrometry and high-field asymmetric waveform ion mobility spectrometry are two of them, because of their simple structure and working conditions of normal pressure, they have becom...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a combined differential ion mobility spectrometry and high-field asymmetric waveform ion mobility spectrometry device, which solves the problems of low resolution and high power consumption of ion mobility spectrometry in complex environments, and realizes on-site Detection and analysis of material composition

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