High-Throughput Trace Analysis of Explosives in Water by Laser Diode Thermal Desorption/Atmospheric Pressure Chemical Ionization-Tandem Mass Spectrometry

被引：32

作者：

Badjagbo, Koffi ^{[1
]}

Sauve, Sebastien ^{[1
]}

机构：

[1] Univ Montreal, Dept Chem, Montreal, PQ H3C 3J7, Canada

来源：

ANALYTICAL CHEMISTRY | 2012年 / 84卷 / 13期

基金：

加拿大自然科学与工程研究理事会;

关键词：

SOLID-PHASE MICROEXTRACTION; COLLISION-INDUCED DISSOCIATION; ELECTROSPRAY-IONIZATION; NITROAROMATIC EXPLOSIVES; ORGANIC EXPLOSIVES; NITRATE ESTER; ADDUCT IONS; EXTRACTION; RESIDUES; SAMPLES;

D O I：

10.1021/ac300918f

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Harmful explosives can accumulate in natural waters in the long term during their testing, usage, storage, and dumping and can pose a health risk to humans and the environment. For the first time, attachment of small anions to neutral molecules in laser diode thermal desorption/atmospheric pressure chemical ionization was systematically investigated for the direct determination of trace nitroaromatics, nitrate esters, and nitramine explosives in water. Using ammonium chloride as an additive improved the instrument response for all the explosives tested and promoted the formation of several characteristic adduct ions. The method performs well achieving good linearity over at least 2 orders of magnitude, with coefficients of determination greater than 0.995. The resulting limits of detection are in the range of 0.009-0.092 mu g/L. River water samples were successfully analyzed by the proposed method with accuracy in the range of 96-98% and a response time of 15 s, without any further pretreatment or chromatographic separation.

引用

页码：5731 / 5736

页数：6

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