高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (3): 391.

• 研究简报 • 上一篇    下一篇

大黄酸玻碳修饰电极对血红蛋白的催化还原

张玉忠, 赵红, 袁倬斌   

  1. 中国科学技术大学研究生院化学部, 北京 100039
  • 收稿日期:2001-03-20 出版日期:2002-03-24 发布日期:2002-03-24
  • 通讯作者: 袁倬斌(1938年出生),男,教授,博士生导师,从事电分析化学及毛细管电泳研究.E-mail:yuanzhuobin@263.net E-mail:yuanzhuobin@263.net
  • 基金资助:

    国家自然科学基金(批准号:29875027)资助

Electrocatalysis of Hemoglobin at Rhein Modified Glassy Carbon Electrodes

ZHANG Yu-Zhong, ZHAO Hong, YUAN Zhuo-Bin   

  1. Department of Chemistry, Graduate School, University of Science and Technolody of China, Beijing 100039, China
  • Received:2001-03-20 Online:2002-03-24 Published:2002-03-24

PDF (PC)

被引次数

55

关键词: 血红蛋白, 大黄酸, 修饰电极, 电催化

Abstract: The electrochemical behavior of rhein modified glassy carbon electrodes were studied. Three peaks in CVappeared in the potential rang of +0.4— -0.8 V(vs. Ag/AgCl) in 0.06 mol/L H2SO4. p1 and p3 are a couples of oxidationreduction peak, the electrode process contains two electrons and two protons. The formal potential(Eo')is -0.202 V(vs. Ag/AgCl) at the scanning rate of 50 mV/s. The cathodic peak potential shifts linearly in the negative direction with increasing solution pH with a slope of 67 mV per pH unit. The rhein modified electrode shows an electrocatalytic activity for reduction of hemoglobin in 0.06 mol/L H2SO4 solution. The peak currents are proportional to the concentrations of the hemoglobin in the range of 6.0×10-8—1.3×10-6 mol/L, the relative standard deviation is 3.5% for 6 successive determination of 1.0×10-7 mol/Lhemoglobin solution. The catalytic mechanism has been discussed.

Key words: Hemoglobin, Rhein, Carbon modified electrode, Electrocatalysis

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