熱陽イオン放射型気体ハロゲン化物検出器の陽極特性

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書誌事項

タイトル別名
  • Anode characteristics of thermal positive ion emission detector for gaseous halides.
  • ネツ ヨウイオン ホウシャガタ キタイ ハロゲンカブツ ケンシュツキ ノ ヨウ

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抄録

The anode characteristics in a halogen gas detector based on thermal positive ionization of alkali metal atoms on a heated platinum was examined to elucidate the detection mechanism and to improve its performance. The detection device was composed of two platinum filament electrodes which emit and collect, respectively, a positive ion under the various working conditions in the air and in the standard gaseous halides. The anode had been doped with potassium atoms, on which the ion current was governed by the rate of the diffusion of the atom onto the surface rather than by the ionizaion efficiency of the atom in the air. The detection of organic halogens was achieved through the two steps; first, pyrolizing the halides on the atom traps of anode, and second, promoting the diffusion of the potassium atoms by etching the trap surface. The relationships among the increment of the current, various kinds of gases and their concentration were also examined.

収録刊行物

  • 分析化学

    分析化学 36 (8), 467-472, 1987

    公益社団法人 日本分析化学会

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