高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (1): 68.

• 研究论文 • 上一篇    下一篇

双层聚合膜可乐定选择性涂丝电极的研究

胡效亚, 冷宗周   

  1. 扬州师范学院化学系
  • 收稿日期:1987-07-20 出版日期:1989-01-24 发布日期:1989-01-24
  • 基金资助:

    江苏省教委自然科学基金

Studies on Clonidine Hydrochloride Selective Coated Wire Electrode with Bilayer Polymeric Films

Hu Xiaoya, Leng Zongzhou   

  1. Department of Chemistry, Yangzhou Teachers College, Yangzhou
  • Received:1987-07-20 Online:1989-01-24 Published:1989-01-24

摘要: 报告一种新型双层聚合膜可乐定涂丝电极的研制。通过电化学聚合,在铂丝表面修饰一层具有导电性能的聚苯胺薄膜,外层涂PVC膜(含四苯硼酸-可乐定活性物质)。此种电极既保持了涂丝电极的优点,又具备较好的稳定性和重现性,连续测定8h,电位值漂移0.8mV,线性范围为1×10-1~8×10-6mol/L,电极响应斜率56.7mV/decade;用加入稀释法测定了回收率,平均回收率为100.9%,标准偏差为1.3%。

关键词: 电位分析法, 离子选择电极, 涂丝电极, 修饰电极, 可乐定

Abstract: A new type of coated wire electrode (CWE) with bilayer .polymeric films is reported. Platinum wire is modified by conductive polyaniline and then with a film of PVC (containing electroactive species). This kind of electrode not only has merits of CWE, but also has fine stability and repro-ducibility. With successive determination of 8 hours, the potential drifts are about 0.8mV. The Nernstian linear range of electrode shows 1 × 10-1~8×10-6mol/L with an average slope of 56.7mV/decade. The direct potentiometry for samples shows 100.9% of average recovery and 1.3% of standard deviation.

Key words: Potentiometry, Ion-selective electrode, Coated-wire electrode, Modified electrode, Clonidine

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