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Dopant-assisted reactive low temperature plasma probe for sensitive and specific detection of explosives
Chen, Wendong; Hou, Keyong; Hua, Lei; Li, Haiyang
刊名ANALYST
2015
DOI10.1039/c5an00816f
140期:17页:6025-6030
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Analytical
研究领域[WOS]Chemistry
关键词[WOS]ION MOBILITY SPECTROMETRY ; DESORPTION ELECTROSPRAY-IONIZATION ; ATMOSPHERIC-PRESSURE AFTERGLOW ; MASS-SPECTROMETRY ; CORONA DISCHARGE ; REAL-TIME ; CURRENT TRENDS ; BLACK POWDER ; SURFACES ; SELECTIVITY
英文摘要A dopant-assisted reactive low temperature plasma (DARLTP) probe was developed for sensitive and specific detection of explosives by a miniature rectilinear ion trap mass spectrometer. The DARLTP probe was fabricated using a T-shaped quartz tube. The dopant gas was introduced into the plasma stream through a side-tube. Using CH2Cl2 doped wet air as the dopant gas, the detection sensitivities were improved about 4-fold (RDX), 4-fold (PETN), and 3-fold (tetryl) compared with those obtained using the conventional LTP. Furthermore, the formation of [M + Cl-35](-) and [M + Cl-37](-) for these explosives enhanced the specificity for their identification. Additionally, the quantities of fragment ions of tetryl and adduct ions such as [RDX + NO2](-) and [PETN + NO2](-) were dramatically reduced, which simplified the mass spectra and avoided the overlap of mass peaks for different explosives. The sensitivity improvement may be attributed to the increased intensity of reactant ion [HNO3 + NO3](-), which was enhanced 4-fold after the introduction of dopant gas. The limits of detection (LODs) for RDX, tetryl, and PETN were down to 3, 6, and 10 pg, respectively. Finally, an explosive mixture was successfully analyzed, demonstrating the potential of the DARLTP probe for qualitative and quantitative analysis of complicated explosives.
语种英语
WOS记录号WOS:000359217000028
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/146439
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Peoples R China
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Chen, Wendong,Hou, Keyong,Hua, Lei,et al. Dopant-assisted reactive low temperature plasma probe for sensitive and specific detection of explosives[J]. ANALYST,2015,140(17):6025-6030.
APA Chen, Wendong,Hou, Keyong,Hua, Lei,&Li, Haiyang.(2015).Dopant-assisted reactive low temperature plasma probe for sensitive and specific detection of explosives.ANALYST,140(17),6025-6030.
MLA Chen, Wendong,et al."Dopant-assisted reactive low temperature plasma probe for sensitive and specific detection of explosives".ANALYST 140.17(2015):6025-6030.
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