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High-flux ion mobility spectrometer

A technology of ion mobility spectrometer and ion transfer tube, which is applied in the detection field of toxic and harmful substances, can solve the problems of slow detection speed and easy to cause false alarms, and achieve the effect of improving detection sensitivity and ionization efficiency

Pending Publication Date: 2020-06-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the detection of explosives, the suspicious potential carrier or the surface of the luggage is usually wiped with a sampling cloth. This method of wiping and sampling is not only slow in detection speed, but also prone to false positives, etc.

Method used

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  • High-flux ion mobility spectrometer
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Use the reagent molecule-assisted photoionization technology to detect 100ng TATP headspace vapor. In mode a, without turning on lights 1, 2 and 3, no TATP signal can be detected, such as figure 2 (a) shows the dynamic tracking curve, the signal intensity is 0mV.

Embodiment 2

[0016] Using reagent molecule-assisted photoionization technology, detect 100ng of TATP headspace vapor, in b mode, only turn on lamp 1, not turn on lamp 2 and lamp 3, and detect a weak TATP signal, such as figure 2 (b) shows the dynamic tracking curve, the signal strength is 48mV.

Embodiment 3

[0018] Using the reagent molecule-assisted photoionization technology, detect 100ng of TATP headspace vapor, in c mode, only turn on light 1 and light 2, do not turn on light 3, a slightly stronger TATP signal is detected, such as figure 2 (c) shows the dynamic tracking curve, the signal strength is 98mV.

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Abstract

The invention discloses a high-flux ion mobility spectrometer. Three vacuum ultraviolet lamp light ionization sources are respectively arranged on the upper side and the lower side of a migration spectrum reaction area and at the left end of the reaction area to realize high-efficiency ionization of a high-flux gas sample. The high-flux ion mobility spectrometer is used for real-time detection ofthe high-flux gas sample; the detection sensitivity of an actual sample is increased by at least over three times; and the high-flux ion mobility spectrometer is used for high-flux online screening detection of TATP and other novel explosives in airport security check.

Description

technical field [0001] Based on the photoionization ion migration spectrum, the present invention further improves the ionization efficiency of the sample, thereby improving the sensitivity of the object to be tested, and is used for high-throughput screening of airport security checks and the detection of toxic and harmful articles of chemical pollution sources. Background technique [0002] Ion mobility spectrometry has fast detection speed and high sensitivity, and can be used for the detection of explosives, drugs, and chemical warfare agents. For the detection of explosives, the suspicious potential carrier or the surface of the luggage is usually wiped with a sampling cloth. This method of wiping and sampling is not only slow in detection speed, but also prone to false alarms. [0003] For this reason, the purpose of developing this high-throughput ion mobility spectrometer is to realize high-throughput gas detection in the security inspection process, high-throughput ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/622
Inventor 蒋丹丹李海洋厉梅
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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