Single-pipe double-chamber suction test paper dual-sampling cation and anion mobility spectrum dual measuring pipe

Abstract

The invention aims to provide a single-pipe double-chamber suction test paper dual-sampling cation and anion mobility spectrum dual measuring pipe. A sample injector has a slit-shaped flat injection port, and the injection port generates a negative pressure under the action of a sampling pump so that air in the front can be absorbed into the sample injector and a piece of analysis test paper can be inserted into the sample injector to extract substances adhered to the test paper after the test paper is scrubbed. A first ionic emigration area and a second ionic emigration area are arranged in a mobility spectrum measuring tube body, so the dual measurement of the cations and anions of different substances such as poisons and explosives can be completed with high sensitivity in real time, aplurality of mixed substances can be analyzed and a large number of contraband wares can be compared simultaneously. The single-pipe double-chamber suction test paper dual-feeding cation and anion mobility spectrum dual measuring pipe has novel design, a rational structure and multiple functions and realizes the aim of the invention.

Description

technical field [0001] The invention relates to an ion mobility measurement tube, in particular to a single-tube double-cavity suction test paper double-injection positive and negative ion mobility spectrometry tube for simultaneous ion mobility spectrometry analysis of positive and negative ions belonging to drug explosives. It belongs to the technical field of material analysis. Background technique [0002] Most of the existing ion mobility measurement tubes are single-measure positive ion or negative ion mobility measurement tubes, and the instruments made of them are only for positive ion drug detection or negative ion explosive detection, and their functions are single. ; If it is necessary to measure the positive ion and negative ion mobility of suspicious samples at the same time, when judging whether the sample is a drug or explosive, two different instruments are required to test the positive ion and negative ion mobility respectively, which is very troublesome, an...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing ion mobility measurement tubes are single-measure positive ion or negative ion mobility measurement tubes, and the instruments made of them are only for positive ion drug detection or negative ion explosive detection, and their functions are single. ; If it is necessary to measure the positive ion and negative ion mobility of suspicious samples at the same time, when judging whether the sample is a drug or explosive, two different instruments are required to test the positive ion and negative ion mobility respectively, which is very troublesome, and there are few samples that need to be tested. At the same time, it is impossible to test the mobility of positive ions and negative ions separately; in addition, there is also a time-switching method of adding positive high voltage and negative high voltage to the single tube to alternately measure the mobility of positive ions and negative ions. It is possible to detect drugs and explosives in a single instrument, but if positive and negative pulse high voltages are applied to the same migration area of ​​a measuring tube, the positive and negative ion movements will interfere with each other seriously, and it is difficult to calibrate different reference objects, and the noise is large. Sensitivity is affected; there is also a mass-to-charge ratio drift tube called DMS, which can measure the drift characteristics of positive and negative ions by adding different bias voltages in the pulsed electric field, but the mechanism is not to measure the mobility spectrum characteristics of material ions. and cannot detect as many narcotics or explosives because too much bias voltage can be arranged in one cycle

[0003] At present, most of the sample injectors of existing analytical instruments and test sensors form a complex multi-component system. The sample injectors capable of heating vaporized samples do not include the aspiration analysis and test paper analysis through a single injection port, and the aspiration The carrier gas is fed back to the injection port to increase the intake of the sample. It is made into one, and there is a lack of efficient compact one-piece aspirating test paper double injector; other places have no substance positive and negative ion mobility detection and feedback-type aspirating test paper double feeding integrated test device

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