中华医学超声杂志

应用化学 ›› 1990, Vol. 0 ›› Issue (1): 91-93.

• 研究简报 • 上一篇    下一篇

聚苯胺修饰电极酸碱示波电位滴定法——Ⅰ.水溶液中的酸碱滴定

胡效亚, 冷宗周   

  1. 扬州师范学院化学系 扬州 225002
  • 收稿日期:1989-03-27 修回日期:1989-05-17 出版日期:1990-02-10 发布日期:1990-02-10

OSCILLOGRAPHIC POTENTIOMETRIC ACID-BASE TITRATION WITH POLYANILINE MODIFIED ELECTRODE Ⅰ.ACID-BASE TITRATION IN AQUEOUS SOLUTION

Hu Xiaoya, Leng Zongzhou   

  1. Department of Chemistry, Yangzhou Teachers'College, Yangzhou 225002
  • Received:1989-03-27 Revised:1989-05-17 Published:1990-02-10 Online:1990-02-10

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摘要： 示波电位滴定具有终点直观、仪器便宜、操作简便、快速、准确等特点。本文将对氢离子响应敏锐、使用寿命长、制备简单的聚苯胺修饰电极(PAME)[4,5]应用于酸碱示波电位滴定中,使电位突跃更加明显,化学计量点更易判断(与双铂电极体系比较),可滴定多元弱酸、弱碱、混合酸和混合碱.与pH玻璃电极比较,具有阻抗低,响应灵敏、迅速,终点电位突跃大,不易损坏,不需预处理,制备简单等特点.

关键词: 示波电位滴定, 酸碱滴定, 聚苯胺修饰电极

Abstract: Using polyaniline modified electrode as an indicator electrode and calomel electrodeas a reference electrode, the oscillographic potentiometric acid-base titrations were per-formed successfully in aqueous solutions containing strong acids or bases, weak acids orbases, polyprotontic acids or mixtures of bases. In comparison with biplatinum acid-baseoscillo-potentiometric titration this method gives more distinct potential breaks and thestoichiometric point can be observed easily with good roproducibility.

Key words: oscillographic potentiometric titration, acid-base titration, polyaniline modified electrode

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