高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (11): 1462.

• 论文 • 上一篇    下一篇

舒乐安定吸附伏安法的研究

纪纲, 李启隆   

  1. 北京师范大学化学系, 北京, 100875
  • 收稿日期:1990-09-11 出版日期:1991-11-24 发布日期:1991-11-24
  • 通讯作者: 李启隆
  • 基金资助:

    国家自然科学基金

Studies on the Adsorptive Voltammetry of Estazolam

Ji Gang, Li Qi-long   

  1. Department of Chemistry, Beijing Normal University, Beijing, 100875
  • Received:1990-09-11 Online:1991-11-24 Published:1991-11-24

关键词: 舒乐安定, 吸附波, 吸附伏安法

Abstract: In 0. 1 mol/L NH3-NH4Cl buffer solution(pH9. 3), a sensitive reduction peak of es-tazolam was obtained by adsorptive voltammetry after accumulation on the surface of HMDE [initial potential -0. 80 V(w. Ag/AgCl), v=100 mV/s]. The peak potential was -1. 05 V. The linear range between ip and the concentration of estazolam is form 3. 0×10-9to 5.0×10-6mol/Lwith a detection limit of 1. 0×10-9mol/L. The electrochemical behavior of the system and its electrode reaction mechanism were studied by means of cyclic voltammetry, constant-potential coulometry, etc.. The electrode reduction process is irreversible with the adsorption characteristics. The adsorption of the system obeys Frumkin adsorption isotherm. The number of reduction electrons is 2 and the transfer coefficient a is 0. 77.

Key words: Estazolam, Adsorptive wave, Adsorptive voltammetry

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