化学学报 ›› 1987, Vol. 45 ›› Issue (10): 1024-1028. 上一篇    下一篇

研究论文

功能高分子膜离子选择电极研究VI.压片PVC膜氯离子选择电极的暂态极化行为

孙志胜;章咏华   

  1. 中国科学院长春应用化学研究所
  • 发布日期:1987-10-15

Studies on functional polymer membrane ion-selective electrodes VI. Transient behaviour of the pressed pellet PVC membrane chloride electrode and its current-analysis performance

SUN ZHISHENG;ZHANG YONGHUA   

  • Published:1987-10-15

关键词: 离子选择电极, 聚氯乙烯, 氯离子, 极化效应, 膜电极, 极化, 电位测定, 聚合物膜, 暂态特性

Both fast triangle-wave potential sweep method and fast square-wave potential sweep method have been applied to study transient behavior of the functional polymer membrane chloride electrode. On the basis of current-time curve and potential-time curve, the electrochem. parameters of the electrode were calculated successfully under various conditions. The characterization of the level of ion transfer has been made by means of electrochem. polarization resistance Rr which is related not only to the membrane composition and its shape (area etc.), but also to concentration of the chloride ions in solution The Rr values calculated from both methods are the same. Cl- in the concentration range of 10-4-10-1 mol/L showed linear relation between i and log c, where c is the concentration The slope is proportional to the membrane area.

Key words: ION SELECTIVE ELECTRODE, POLYVINYL CHLORIDE, CHLORINE ION, POLARIZATION EFFECT, MEMBRANE ELECTRODES, POLARIZATION, POTENTIOMETRIC DETERMINATION, POLYMER FILMS, TRANSIENT CHARACTERISTICS

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