イオン選択性電極を用いる地熱水中の極微量ヨウ化物イオンの定量

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タイトル別名
  • Determination of micro amounts of iodide in geothermal water using an ion selective electrode.
  • イオン センタクセイ デンキョク オ モチイル チネツ スイチュウ ノ キョク

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抄録

Iodide in various geothermal water samples was determined simply and rapidly with an iodide ion selective electrode. Two procedures were investigated for the determination of iodide. The first method is a direct method in which the iodide content in the geothermal water samples was directly measured with the iodide electrode after the addition of sodium hydrogen sulfite, a definite amount of iodide and ionic strength adjustment buffer. The other is a solvent extraction method in which iodide in the samples oxidized in advance by hydrogen peroxide was extracted into carbon tetrachloride. The iodide backextracted into an aqueous sulfite solution was measured with the iodide electrode. Both procedures were successfully applied to the determination of iodide in the concentration below 1 ppm in various geothermal water samples with a relative standard deviation of 1.8%, and the results obtained by the proposed method were in good agreement with those by the spectrophotometric method using Methylene Blue.

収録刊行物

  • 分析化学

    分析化学 40 (1), T5-T8, 1991

    公益社団法人 日本分析化学会

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