Inhibition of Precipitation Adhesion to Electrodes by the Addition of Dextrin in the Automatic Measurement of Chloride Ions by Potentiometric Titration

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  • KOGA Akihiro
    Research Institute of Salt and Sea Water Science, The Salt Industry Center of Japan
  • NODA Yasushi
    Research Institute of Salt and Sea Water Science, The Salt Industry Center of Japan

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  • 電位差滴定法で塩化物イオンを連続自動測定するためのデキストリン添加と電極への沈殿物付着抑制について
  • デンイサ テキテイホウ デ エンカブツ イオン オ レンゾク ジドウ ソクテイ スル タメ ノ デキストリン テンカ ト デンキョク エ ノ チンデンブツ フチャク ヨクセイ ニ ツイテ

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Abstract

Inhibition of precipitation adhesion to electrodes in potentiometer titration was examined for the purpose of automatic and highly accurate measurement of the chloride ion content of a sample salt solution. The adhesion of precipitates to the electrode was inhibited by the addition of dextrin to the sample solution. The influence of the concentration of dextrin on the measured chloride value was examined, and an optimum concentration of dextrin was determined. As a result, the chloride ion amount could be automatically measured with a high degree of accuracy with the addition of dextrin to the sample solution.

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