Detection of nitro-based and peroxide-based explosives by fast polarity-switchable ion mobility spectrometer with ion focusing in vicinity of Faraday detector.
Detection of nitro-based and peroxide-based explosives by fast polarity-switchable ion mobility spectrometer with ion focusing in vicinity of Faraday detector.
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利用法拉第探测器附近离子聚焦的快速极性可切换离子淌度谱仪检测硝基和过氧化物基爆炸物
DOI：
10.1038/srep10659
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发表时间：
2015-05-29
影响因子：
4.6
通讯作者：
Li H
中科院分区：
文献类型：
--
作者：
Zhou Q;Peng L;Jiang D;Wang X;Wang H;Li H
离子迁移谱仪（IMS）已被广泛应用于爆炸物的现场检测。常见的硝基爆炸物通常采用负离子质谱检测，而新兴的过氧化物基爆炸物则采用正离子质谱检测。在这项研究中，一个快速的极性切换IMS构建检测这两种爆炸物在一个单一的测量。针对传统的大尺寸法拉第探测器会产生拖尾反应物离子峰（RIP）的问题，通过减小探测器半径至3.3 mm，并将孔栅与前保护环之间的电压差增大至591 V，研制了一种在附近具有离子聚焦的法拉第探测器，该探测器可以在不损失信号强度的情况下消除RIP的拖尾峰。利用该离子聚焦于法拉第检测器附近的快速极性切换离子迁移谱仪，对10 ng 2，4，6-三硝基甲苯（TNT）和50 ng三过氧化二胺（HMTD）的混合物进行了极性切换检测，结果表明，[TNT-H]-和[HMTD+H]+可同时检测。此外，利用法拉第探测器的近区离子聚焦消除RIP中的拖尾峰，也保证了对常见无机炸药中KClO 4、KNO 3和S的准确识别，其产物离子峰与RIP相当接近。
Ion mobility spectrometer (IMS) has been widely deployed for on-site detection of explosives. The common nitro-based explosives are usually detected by negative IMS while the emerging peroxide-based explosives are better detected by positive IMS. In this study, a fast polarity-switchable IMS was constructed to detect these two explosive species in a single measurement. As the large traditional Faraday detector would cause a trailing reactant ion peak (RIP), a Faraday detector with ion focusing in vicinity was developed by reducing the detector radius to 3.3 mm and increasing the voltage difference between aperture grid and its front guard ring to 591 V, which could remove trailing peaks from RIP without loss of signal intensity. This fast polarity-switchable IMS with ion focusing in vicinity of Faraday detector was employed to detect a mixture of 10 ng 2,4,6-trinitrotoluene (TNT) and 50 ng hexamethylene triperoxide diamine (HMTD) by polarity-switching, and the result suggested that [TNT-H]− and [HMTD+H]+ could be detected in a single measurement. Furthermore, the removal of trailing peaks from RIP by the Faraday detector with ion focusing in vicinity also promised the accurate identification of KClO4, KNO3 and S in common inorganic explosives, whose product ion peaks were fairly adjacent to RIP.
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影响因子：
6.1
作者：
Wu, C;Steiner, WE;Hill, HH
通讯作者：
Hill, HH
影响因子：
7.4
作者：
Blanco, Gustavo A.;Nai, Yi H.;Breadmore, Michael C.
通讯作者：
Breadmore, Michael C.
影响因子：
1.8
作者：
Oxley, Jimmie C.;Smith, James L.;Brady, Joseph
通讯作者：
Brady, Joseph
影响因子：
7.4
作者：
Jafari, Mohammad T.;Saraji, Mohammad;Sherafatmand, Hossein
通讯作者：
Sherafatmand, Hossein
DOI：
10.1007/s12127-012-0095-z
发表时间：
2012-12-01
影响因子：
--
作者：
Langejuergen, Jens;Cochems, Philipp;Zimmermann, Stefan
通讯作者：
Zimmermann, Stefan