高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (6): 827.

• 论文 • 上一篇    下一篇

碳纤维微电极研究(ⅩⅧ)─亚甲基蓝/Nafion修饰微柱碳纤维电极测定血红蛋白的研究

鞠熀先, 荀以刚, 陈洪渊   

  1. 南京大学化学系, 南京, 210008
  • 收稿日期:1993-07-15 修回日期:1993-01-30 出版日期:1994-06-24 发布日期:1994-06-24
  • 通讯作者: 陈洪渊.
  • 作者简介:鞠熀先.男,29岁,博士.讲师.
  • 基金资助:

    国家自然科学基金

Investigation on Carbon fiber Microelectrodes(ⅩⅧ)─The Determination of Hemoglobin at a Methylene Blue/Nafion Modified Carbon Fiber Microcylinder Electrode

JU Huang-Xian, XUN Yi-Gang, CHEN Hong-Yuan   

  1. Department of Chemistry, Nanjing University, Najing, 210008
  • Received:1993-07-15 Revised:1993-01-30 Online:1994-06-24 Published:1994-06-24

摘要: 研究了MB/Nafion修饰微柱碳纤维电极的制备方法,用扫描电镜对它的表面形态进行了观察。该电极在缓冲溶液中扫描或放置的稳定性都很好,在弱酸性介质中,对血红蛋白在碳纤维电极上的氧化有催化作用,峰电流的增加与血红蛋白的浓度在5×10-6~5×10-5mol/L范围内有良好的线性关系,对6×10-6mol/L的血红蛋白测定6次的变异系数为3.5%,可用于血清中血红蛋白的直接电化学测定,探讨了电催化作用的机理。

关键词: 碳纤维微电极, 微柱电极, Nafion修饰电极, 亚甲基蓝, 血红蛋白

Abstract: The methylene blue/Nafion modified carbon fiber microcylinder electrode is manufactured.The state and constitution of the modified electrode surface is observed by scanning electron microscope.The stability is very good in either events scaned with cyclic voltmmetry or immersed in the buffer solution of pH=7.2.The electrode shows significantly electrocatalytic activity to the oxidation of hemoglobin in the system of weak acid, it can be used for the determination of hemoglobin in the range of 5×10-6-5×10-5mol/L.The variation coefficient of peak current is 3.5%determining continuously 6×10-6mol/L HBfor 6 times.The catalytic mechanism is discussed.

Key words: Carbon fiber microelectrode, Microcylinder electrode, Nafion modified electrode, Methylene blue, Hemoglobin

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