Detection of explosives in hair using ion mobility spectrometry
Detection of explosives in hair using ion mobility spectrometry
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DOI：
10.1111/j.1556-4029.2008.00719.x
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发表时间：
2008-05-01
影响因子：
1.6
通讯作者：
Vadlamannati, Sravanthi
中科院分区：
文献类型：
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作者：
Oxley, Jimmie C.;Smith, James L.;Vadlamannati, Sravanthi
吸附在头发上的常规爆炸物2，4，6-三硝基甲苯（TNT）、硝化甘油（NG）和乙二醇二硝酸酯（EGDN）可以通过离子迁移谱仪（IMS）以E模式（用于爆炸物）直接检测。国际监测系统在E模式下难以探测到的恐怖爆炸物三过氧化三丙酮（TATP）在N模式下探测到（用于麻醉品）。使用三种模式将样品引入IMS蒸气解吸单元：（i）将毛发直接放置到单元中，（ii）擦拭毛发并放置拭子（即，纸GE-IMS样品捕集器）放入该装置中，和（iii）位于样品捕集器上并放入该装置中的毛发的乙腈提取物。TNT，NG和EGDN在E-模式下通过所有三种样品引入方法进行检测。由于灵敏度较低，只有在头发暴露于蒸汽16天后才能通过乙腈提取法检测到TATP。对于标准溶液，E模式下的TATP检测需要的样品量约为EGDN的10倍（3.9 μ g与0.3 μ g相比）。IMS在N模式下通过所有三种样品引入模式检测来自毛发的TATP。
Conventional explosives 2,4,6-trinitrotoluene (TNT), nitroglycerin (NG), and ethylene glycol dinitrate (EGDN) sorbed to hair can be directly detected by an ion mobility spectrometer (IMS) in E-mode (for explosives). Terrorist explosive, triacetone triperoxide (TATP), difficult to detect by IMS in E-mode, was detected in N-mode (for narcotics). Three modes of sample introduction to IMS vapor desorption unit were used: (i) placement of hair directly into the unit, (ii) swabbing of hair and placement of swabs (i.e., paper GE-IMS sample traps) into the unit, and (iii) acetonitrile extracts of hair positioned on sample traps and placed into the unit. TNT, NG, and EGDN were detected in E-mode by all three sample introduction methods. TATP could only be detected by the acetonitrile extraction method after exposure of the hair to vapor for 16 days because of lower sensitivity. With standard solutions, TATP detection in E-mode required about 10 times as much sample as EGDN (3.9 mu g compared with 0.3 mu g). IMS in N-mode detected TATP from hair by all three modes of sample introduction.