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Anal Chim Acta

Title:		Ion mobility spectrometric analysis of vaporous chemical warfare agents by the instrument with corona discharge ionization ammonia dopant ambient temperature operation
Author(s):		Satoh T; Kishi S; Nagashima H; Tachikawa M; Kanamori-Kataoka M; Nakagawa T; Kitagawa N; Tokita K; Yamamoto S; Seto Y;
Address:		"Third Department of Forensic Science, National Research Institute of Police Science, 6-3-1 Kashiwanoha, Kashiwa, Chiba 277-0882, Japan; Tokyo Metropolitan Police Department, 2-2-1 Kasumigaseki, Chiyoda-ku, Tokyo 100-8929, Japan. Third Department of Forensic Science, National Research Institute of Police Science, 6-3-1 Kashiwanoha, Kashiwa, Chiba 277-0882, Japan; Technopro, Inc., Chiba Branch, 1-15-1 Benten, Chuo-ku, Chiba, Chiba 260-0045, Japan. Third Department of Forensic Science, National Research Institute of Police Science, 6-3-1 Kashiwanoha, Kashiwa, Chiba 277-0882, Japan. S. T. Japan Inc., 1-14-10 Kakigara-cho Nihonbashi, Chuo-ku, Tokyo 103-0014, Japan. Third Department of Forensic Science, National Research Institute of Police Science, 6-3-1 Kashiwanoha, Kashiwa, Chiba 277-0882, Japan. Electronic address: seto@nrips.go.jp"
Journal Title:		Anal Chim Acta
Year:		2015
Volume:		20150204
Issue:
Page Number:		39 - 52
DOI:		10.1016/j.aca.2015.02.004
ISSN/ISBN:		1873-4324 (Electronic) 0003-2670 (Linking)
Abstract:		"The ion mobility behavior of nineteen chemical warfare agents (7 nerve gases, 5 blister agents, 2 lachrymators, 2 blood agents, 3 choking agents) and related compounds including simulants (8 agents) and organic solvents (39) was comparably investigated by the ion mobility spectrometry instrument utilizing weak electric field linear drift tube with corona discharge ionization, ammonia doping, purified inner air drift flow circulation operated at ambient temperature and pressure. Three alkyl methylphosphonofluoridates, tabun, and four organophosphorus simulants gave the intense characteristic positive monomer-derived ion peaks and small dimer-derived ion peaks, and the later ion peaks were increased with the vapor concentrations. VX, RVX and tabun gave both characteristic positive monomer-derived ions and degradation product ions. Nitrogen mustards gave the intense characteristic positive ion peaks, and in addition distinctive negative ion peak appeared from HN3. Mustard gas, lewisite 1, o-chlorobenzylidenemalononitrile and 2-mercaptoethanol gave the characteristic negative ion peaks. Methylphosphonyl difluoride, 2-chloroacetophenone and 1,4-thioxane gave the characteristic ion peaks both in the positive and negative ion mode. 2-Chloroethylethylsulfide and allylisothiocyanate gave weak ion peaks. The marker ion peaks derived from two blood agents and three choking agents were very close to the reactant ion peak in negative ion mode and the respective reduced ion mobility was fluctuated. The reduced ion mobility of the CWA monomer-derived peaks were positively correlated with molecular masses among structurally similar agents such as G-type nerve gases and organophosphorus simulants; V-type nerve gases and nitrogen mustards. The slope values of the calibration plots of the peak heights of the characteristic marker ions versus the vapor concentrations are related to the detection sensitivity, and within chemical warfare agents examined the slope values for sarin, soman, tabun and nitrogen mustards were higher. Some CWA simulants and organic solvents gave the ion peaks eluting at the similar positions of the CWAs, resulting in false positive alarms"
Keywords:		Ammonia/*chemistry Chemical Warfare Agents/*analysis/chemistry Mass Spectrometry Pressure *Temperature Volatilization Chemical warfare agents Ion mobility spectrometry Organic solvents Performance evaluation Simulants;
Notes:		"MedlineSatoh, Takafumi Kishi, Shintaro Nagashima, Hisayuki Tachikawa, Masumi Kanamori-Kataoka, Mieko Nakagawa, Takao Kitagawa, Nobuyoshi Tokita, Kenichi Yamamoto, Soichiro Seto, Yasuo eng Netherlands 2015/03/04 Anal Chim Acta. 2015 Mar 20; 865:39-52. doi: 10.1016/j.aca.2015.02.004. Epub 2015 Feb 4"