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Talanta. 2016 Aug 15;156-157:191-195. doi: 10.1016/j.talanta.2016.05.025. Epub 2016 May 10.

Ultrasensitive detection of explosives and chemical warfare agents by low-pressure photoionization mass spectrometry.

Author information

1
State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
2
State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: jshu@rcees.ac.cn.

Abstract

On-spot monitoring of threat agents needs high sensitive instrument. In this study, a low-pressure photoionization mass spectrometer (LPPI-MS) was employed to detect trace amounts of vapor-phase explosives and chemical warfare agent mimetics under ambient conditions. Under 10-s detection time, the limits of detection of 2,4-dinitrotoluene, nitrotoluene, nitrobenzene, and dimethyl methyl phosphonate were 30, 0.5, 4, and 1 parts per trillion by volume, respectively. As compared to those obtained previously with PI mass spectrometric techniques, an improvement of 3-4 orders of magnitude was achieved. This study indicates that LPPI-MS will open new opportunities for the sensitive detection of explosives and chemical warfare agents.

KEYWORDS:

Chemical warfare agent; Explosive; Low-pressure photoionization mass spectrometry; Ultrasensitive detection

PMID:
27260452
DOI:
10.1016/j.talanta.2016.05.025
[Indexed for MEDLINE]

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