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学科主题: 物理化学
题名: Dopant-Assisted Negative Photoionization Ion Mobility Spectrometry for Sensitive Detection of Explosives
作者: Cheng, Shasha1, 2;  Dou, Jian3;  Wang, Weiguo1;  Chen, Chuang1, 2;  Hua, Lei1;  Zhou, Qinghua1, 2;  Hou, Keyong1;  Li, Jinghua1;  Li, Haiyang1
通讯作者: 李海洋
刊名: ANALYTICAL CHEMISTRY
发表日期: 2013
DOI: 10.1021/ac302836f
卷: 85, 期:1, 页:319-326
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 1
项目归属: 102
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
资助者: 1,1
研究领域[WOS]: Chemistry
英文摘要: Ion mobility spectrometry (IMS) is a key trace detection technique for explosives and the development of a simple, stable, and efficient nonradioactive ionization source is highly demanded. A dopant-assisted negative photoionization (DANP) source has been developed for IMS, which uses a commercial VUV krypton lamp to ionize acetone as the source of electrons to produce negative reactant ions in air. With 20 ppm of acetone as the dopant, a stable current of reactant ions of 1.35 nA was achieved. The reactant ions were identified to be CO3-(H2O)(n) (K-0 = 2.44 cm(2) V-1 s(-1)) by atmospheric pressure time-of-flight mass spectrometry, while the reactant ions in Ni-63 source were O-2(-)(H2O) (K-0 = 2.30 cm(2) V-1 s(-1)). Finally, its capabilities for detection of common explosives including ammonium nitrate fuel oil (ANFO), 2,4,6-trinitrotoluene (TNT), N-nitrobis(2-hydroxyethyl)amine dinitrate (DINA), and pentaerythritol tetranitrate (PETN) were evaluated, and the limits of detection of 10 pg (ANFO), 80 pg (TNT), and 100 pg (DINA) with a linear range of 2 orders of magnitude were achieved. The time-of-flight mass spectra obtained with use of DANP source clearly indicated that PETN and DINA can be directly ionized by the ion-association reaction of CO3- to form PETN.CO3- and DINA.CO3- adduct ions, which result in good sensitivity for the DANP source. The excellent stability, good sensitivity, and especially the better separation between the reactant and product ion peaks make the DANP a potential nonradioactive ionization source for IMS.
关键词[WOS]: ATMOSPHERIC-PRESSURE PHOTOIONIZATION ;  CORONA DISCHARGE IONIZATION ;  FLIGHT MASS-SPECTROMETRY ;  GAS-CHROMATOGRAPHY ;  QUANTITATIVE-ANALYSIS ;  CHEMICAL-IONIZATION ;  TRACE DETECTOR ;  AIR ;  MIXTURES ;  DESIGN
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000313156500048
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119217
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, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Jilin Univ, Dept Instrumentat & Elect Engn, Changchun 130021, Jilin, Peoples R China

Recommended Citation:
Cheng, Shasha,Dou, Jian,Wang, Weiguo,et al. Dopant-Assisted Negative Photoionization Ion Mobility Spectrometry for Sensitive Detection of Explosives[J]. ANALYTICAL CHEMISTRY,2013,85(1):319-326.
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