中华医学超声杂志

应用化学 ›› 1988, Vol. 0 ›› Issue (6): 82-85.

• 研究简报 • 上一篇    下一篇

对氨基苯甲酸极谱氢催化波的研究

李沧, 袁倬斌   

  1. 中国科技大学研究生院, 北京
  • 收稿日期:1988-01-20 修回日期:1988-04-09 出版日期:1988-12-10 发布日期:1988-12-10
  • 基金资助:
    国家自然科学基金

STUDY ON POLAROGRAPHIC CATALYTIC WAVE PRODUCED BY p-AMINOBENZOIC ACID

Li Cang, Yuan Zhuobin   

  1. Department of Chemistry, Graduate School USTC, Acamemia Sinica, Beijing
  • Received:1988-01-20 Revised:1988-04-09 Published:1988-12-10 Online:1988-12-10

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摘要： 对氨基苯甲酸(PABA)是B族维生素之一,它对皮肤癌有突出的疗效。关于它的电化学行为前人已有不少工作。

关键词: 极谱催化波, 对氨基苯甲酸, Osteryoung方波极谱法

Abstract: PABA exhibites a well defined single peak in Osteryoung (modern) square wave polarogram in a supporting electrolyte, solution of 0,5M(C2H5)4NBr, The peak potential is -1.529±0.006V(Ag/AgCl) at 18℃, The results proved that the polarographic peak is a hydrogen catalytic wave, There is a lineare relation between catalytic current and PABA concentration from 2.9×10-5 to 1.2×10-3M, The rate constant of electrode reaction is 9.7×10-4cm/s and the. transfer coefficient is 0.56. A mechanism involving radical formation and proton discharge at a hanging mercury drop electrode has been proposed.

Key words: Polarographic catalytic wave, p-Aminotenzoic acid, Osteryoung square wave

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