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化学学报
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化学学报 ›› 1991, Vol. 49 ›› Issue (7): 700-705. 上一篇    下一篇

研究论文

变价态离子电极的理论模型

聂利华;马万里;汤胜修;姚守拙   

  1. 湖南大学化工系新材料研究所
  • 发布日期:1991-07-15

A theoretical model for variable valency ion-selective electrode

NIE LIHUA;MA WANLI;TANG SHENGXIU;YAO SHOUZHUO   

  • Published:1991-07-15

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本文建立了表述变价态离子电极特殊行为的理论模型, 阐明了S-δ经验式及用δ-PH作图法求双质子化离子pKal的潜在机理, 提出更为简便而准确的pKal二阶微商计算法, 并依据电极电位随溶液PH变化的关系求出pKa2。

关键词: 电极, 离子, 电极电位, 理论模型, 膜电位, 电化学方法

A theor. model was proposed to describe the response behavior of the variable valency ion-selective electrode. The S-d relationship for such electrodes was deduced theor. A new and more exact method for determing pKa1 from the d2S/dpH2-pH relationship is suggested. The pKa2 is determine from the E-pH relationship.

Key words: ELECTRODE, IONS, ELECTRODE POTENTIAL, THEORETICAL MODEL, MEMBRANE POTENTIAL, ELECTROCHEMICAL METHOD

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