title: [Automatic continuous monitoring of volatile organic compounds using ion mobility spectrometer array].
abstract: An ion mobility spectrometer array was designed, in order to broaden the detection range of ion mobility spectrometer and improve the accuracy of compound identification. This instrument was based on the combination of ionization sources of 63Ni positive ion mode, 63Ni negative ion mode and photoionization mode with vacuum UV lamp, and it can continuously monitor the volatile organic compounds in air. With the automatic system of sampling and injection of this instrument, the positive ion of dimethyl sulfoxide and negative ion of dichloromethane were detected simultaneously. By comprehensive analysis of spectra with ion mobility spectrometer array, acrylonitrile, m-xylene and acetone were identified, which were difficult to be distinguished under the 63Ni positive ion mode. Acetone samples were determined quantitatively within four days continuously, and the results indicated that the linear range of acetone in this instrument was 2 orders of magnitude. The linear correlation coefficient R was higher than 0.995, and the relative standard deviations were controlled in the range of 4.0%-18.3%. Methacrylate leaked in simulation was monitored on-line for 24 h continuously, using the method of dynamic tracking, and the result showed the leaking time and the concentration of methacrylate directly.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. woshizhouqinghua@126.com
authors.forename: Qing-Hua
authors.initials: QH
authors.lastname: Zhou
authors.forename: Huai-Wen
authors.initials: HW
authors.lastname: Cang
authors.forename: Bang-Yu
authors.initials: BY
authors.lastname: Ju
authors.forename: Lin
authors.initials: L
authors.lastname: Li
authors.forename: Yong-Zhai
authors.initials: YZ
authors.lastname: Du
authors.forename: Chuang
authors.initials: C
authors.lastname: Chen
authors.forename: Ke-Yong
authors.initials: KY
authors.lastname: Hou
authors.forename: Jing-Hua
authors.initials: JH
authors.lastname: Li
authors.forename: Wei-Guo
authors.initials: WG
authors.lastname: Wang
authors.forename: Hai-Yang
authors.initials: HY
authors.lastname: Li
mesh_terms: D000096:Acetone / Q000032:analysis; D000181:Acrylonitrile / Q000032:analysis; D000393:Air Pollutants / Q000032:analysis*; D001322:Autoanalysis; D009532:Nickel; D011868:Radioisotopes; D018629:Spectrometry, Mass, Secondary Ion / Q000295:instrumentation / Q000379:methods*; D055549:Volatile Organic Compounds / Q000032:analysis*; D014992:Xylenes / Q000032:analysis
chemical_list: D000393:Air Pollutants; D011868:Radioisotopes; D055549:Volatile Organic Compounds; D014992:Xylenes; D000096:Acetone; D009532:Nickel; D000181:Acrylonitrile; C031285:3-xylene