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题名: Dopant-assisted reactive low temperature plasma probe for sensitive and specific detection of explosives
作者: Chen, Wendong1;  Hou, Keyong1;  Hua, Lei1;  Li, Haiyang1
刊名: ANALYST
发表日期: 2015
DOI: 10.1039/c5an00816f
卷: 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
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.
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
语种: 英语
WOS记录号: WOS:000359217000028
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146439
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Peoples R China

Recommended Citation:
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.
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