Direct mass spectrometric detection of trace explosives in soil samples

The Analyst
Lipo MaYi Chen

Abstract

The detection of explosives in soil is of great significance in public security programmes and environmental science. In the present work, a ppb-level method was established to directly detect the semi-volatile explosives, RDX and TNT, present in complex soil samples. The method used thermal sampling technique and a direct current atmospheric pressure glow discharge source mounted with a brass cylinder electrode (9 mm × 4.6 mm i.d./5.6 mm o.d.) to face the samples, requiring no sample pretreatment steps such as soil extraction (about ten hours). It was characterized by the merits of easy operation, high sensitivity and fast speed, and has been validated by real soil samples from various locations around a factory or firecracker releasing fields. It took only 5 min per sample, with the limit of detection down to 0.5 ppb (S/N = 3) trinitrohexahydro-1,3,5-triazine in soils heated at 170 °C. It is also extendable to the analysis of other volatile analytes.

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Citations

Feb 21, 2014·Chemical Communications : Chem Comm·Liang ZhaoChunying Duan
Oct 23, 2012·Clinica Chimica Acta; International Journal of Clinical Chemistry·Luhou ShenZheng Ouyang
Apr 18, 2018·The Analyst·Thomas P Forbes, Edward Sisco
Jun 16, 2021·Mass Spectrometry Reviews·Hanlu YueYixiang Duan
Feb 8, 2020·Journal of the American Society for Mass Spectrometry·William L FatiganteChristopher C Mulligan

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