Determination of Volatile Chlorocarbons in Atmosphere by Chemical Ionization Mass Spectrometry

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  • DAISHIMA Shigeki
    Department of Industrial Chemistry, Faculty of Engineering, Seikei University;
  • IIDA Yoshio
    Department of Industrial Chemistry, Faculty of Engineering, Seikei University;
  • KOSHIKAWA Katuya
    Department of Industrial Chemistry, Faculty of Engineering, Seikei University;
  • KAWABAYASHI Jiro
    Department of Industrial Chemistry, Faculty of Engineering, Seikei University;

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Other Title
  • 化学イオン化質量分析法による大気中の揮発性有機塩素化合物の測定
  • カガク イオンカ シツリョウ ブンセキホウ ニ ヨル タイキチュウ ノ キハツ
  • Special Articles on Global and Regional Environment and Chemistry. Determination of Volatile Chlorocarbons in Atmosphere by Chemical Ionization Mass Spectrometry.

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Description

The three methods for the mass spectrometric determination of volatile chlorocarbons were developed. In the discharge-CIMS method, atmosphere sample was directly introduced into the ion source through a short capillary tube (0.25 mm i. d.×1 m). And (M-Cl)+ for 1, 1, 1-trichloroethane, M+ for trichloroethylene and M- for tetrachloroethylene, which formed by ionization reactions such as charge exchange or nondissociative electron resonance capture with air as the reagent gas, were monitored. In the GC/NCIMS methods wihout or with preconcentration using the collection tube packed with Tenax GC and active carbon, chloride ion Cl- produced by dissociative electron resonance capture were detected by selected ion monitoring for detecting chloroform and carbon tetrachloride as well as the above 3 cornpounds. The detection limits were 0.5-1 ppb by discharge-CIMS and 0.01-0.1 ppb by GC/NCIMS with a precision of RSD 3-6%. Chlorocarbons in the atomospheric and the indoor air in many places were determined by the proposed methods.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1991 (6), 803-810, 1991-06-10

    The Chemical Society of Japan

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