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Xuan Y.,Zhejiang University of Technology | Xuan Y.,The Forensic Science Institute of Public Security of Zhejiang Province | Sun N.,Zhejiang University of Technology | Fu D.-F.,The Forensic Science Institute of Public Security of Zhejiang Province | And 3 more authors.
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | Year: 2012

A selective and sensitive LC/APCI-MS/MS was optimized for quantitative analysis of octahydro-1, 3, 5, 7-tetranitro-1, 3, 5, 7-tetrazocine(HMX), hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine(RDX), pentaerythrite tetranitrate(PETN), tetryl(CE), nitroguanidine(NQ), 2, 4, 6-trinitrotoluene(TNT) in sandy loam soils. Accelerated solvent extraction (ASE) and Gel permetion chromatography(GPC) were used as extraction and purification methods, respectively. Sandy loam soils was spiked with explosives, extracted by ASE employed acetone as extraction solvent, purified by GPC used ethyl acetate: cyclohexane (1: 1) as mobile phase and the forerun time was 500s, the main faction was 1520s. The LC/MS analysis employed 1mmol/L formic acid added to the mobile phase to facilitate formation of formic adduct ions[M+HCOO] -. The method detection limits(MDLs) for HMX, RDX, PETN, CE, NQ and TNT were 0.78, 1.44, 1.69, 0.77, 1.06, 1.72ng/mL, respectively and recovery were 49.0%-88.4%, RSD% were 3.5%-10.3%. The method proved effective and could be applied in the system examination and quantitative analysis of high-explosives in exploded residues and environmental samples.

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