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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (5): 415-419. 上一篇    下一篇

研究论文

电化学测定谷胱甘肽方法的研究

王建国*,a 吕 慧a 孙巧花a 李荣志b 钟 岩a
赵 健a 刘 敏a 贾 香a

  

  1. (a辽宁大学化学院 沈阳 110036)
    (b锦州市产品质量监督检验所 锦州 121000)

  • 投稿日期:2008-03-21 修回日期:2008-07-26 发布日期:2009-03-14
  • 通讯作者: 王建国

Method of Electrochemical Determination of Glutathione

Wang, Jianguo *,a Lü, Hui a Sun, Qiaohua a Li, Rongzhi b Zhong, Yan a
Zhao, Jian a Liu, Min a Jia, Xiang a
  

  1. (a College of Chemistry, Liaoning University, Shenyang 110036)
    (b Jinzhou Products Supervision & Inspection Institute, Jinzhou 121000)
  • Received:2008-03-21 Revised:2008-07-26 Published:2009-03-14
  • Contact: Wang, Jianguo

PDF

1858

被引次数

22 | 4

采用循环伏安扫描的方法, 促进谷胱甘肽与邻苯醌亲核加成产物在玻碳电极表面的生成和富集. 在此后的差分脉冲分析中, 邻苯醌的还原峰与谷胱甘肽-邻苯醌加合物的还原峰完全分开, 实现了谷胱甘肽的单独测定. 研究了溶液pH值, 邻苯二酚浓度及循环伏安扫描条件对谷胱甘肽测定的影响. 在优化的条件下, 测定谷胱甘肽的检测限为0.05 µmol/L, 线性范围是0.1 µmol/L～1.7 µmol/L, 同时抗坏血酸, 甘氨酸, L-酪氨酸, L-赖氨酸和半胱氨酸对测定没有干扰. 此电化学测定谷胱甘肽方法选择性好、灵敏度高.

关键词: 谷胱甘肽, 邻苯二酚, 差分脉冲伏安法, 循环伏安法

Cyclic voltammetry (CV) was used to promote the production and accumulation of o-quinone-glutathione adduct at a glassy carbon electrode, which is the nucleophilic addition adduct of glutathione to o-quinone. The reduction peak of o-quinone-glutathione adduct could be separated preferably from o-quinone in the differential pulse voltammogram (DPV). As a result, glutathione was determined by differential pulse voltammetry (DPV) separately. The influence of pH value, catechol concentration and cyclic voltammetric conditions on the peak current of o-quinone-glutathione adduct were was investigated in DPVthe differential pulse voltammetry. . Under the optimum conditions, the voltammetric detection limit for glutathione was 0.05 μmol/L, the linear concentrations range was 0.1μmol/L～1.7 μmol/L. The selectivity of the method was assessed with no interference from ascorbic acid, glycine, L-tyrosine, L-lysine or cysteine. The This method of electrochemical determination of glutathione has good selectivity and high sensitivity.

Key words: glutathione, catechol, differential pulse voltammetry, cyclic voltammetry