中华医学超声杂志

应用化学 ›› 2009, Vol. 26 ›› Issue (09): 1117-1119.

• 研究简报 • 上一篇    下一篇

抗坏血酸在聚对羟基苯甲酸(poly-PHB)修饰玻碳上的电催化

余建国1*,王永乐1,韩李梅1,谷慧科1,赵永男1,张恒彬2   

  1. (1.天津工业大学材料科学与化学工程学院,改性与功能纤维天津市重点实验室 天津 300160;
    2.吉林大学化学学院 长春)
  • 收稿日期:2008-09-02 修回日期:2008-11-03 出版日期:2009-09-10 发布日期:2009-09-10
  • 通讯作者: 余建国,男,讲师; E-mail:jgyu1977@yahoo.com.cn; 研究方向：电分析
  • 基金资助:
    天津市教委科技发展基金(2006ba470)和天津工业大学科研启动基金(029087)资助项目

Electrocatalytic Oxidation of Ascorbic Acid at Poly(para-hydroxybenzoic acid) (poly-PHB) modified glassy carbon electrode

YU Jian-Guo1*, WANG Yong-Le1, HAN Li-Mei,1 GU Hui-Ke1, DIAO Yong-Nan1, ZHANG Heng-Bin2   

  1. (1.College of Materials Science and Chemistry Engineering & Tianjin Key Laboratory of Fiber
    Modification and Functional Fiber,Tianjin Polytechnic University,Tianjin 300160;
    2.College of Chemistry,Jilin University,Changchun)
  • Received:2008-09-02 Revised:2008-11-03 Published:2009-09-10 Online:2009-09-10

PDF

1478

被引次数

2

摘要：

过循环伏安制备了聚对羟基苯甲酸修饰的玻碳电极。考察了该电极对抗坏血酸的电催化性能。结果显示，聚对羟基苯甲酸修饰玻碳电极对抗坏血酸有很好的电催化作用。在修饰后的电极上产生的峰电流比修饰前的电极产生的峰电流大4倍，氧化峰电位负移189 mV。其氧化峰电流与抗坏血酸浓度在2.6×10-5~3.68 ×10-4mol/L范围内呈线性关系，相关性系数为0.9984，检测限为5×10-6 mol/L(S /N = 3)。在AA与UA共存的体系中，能排除多巴胺对抗坏血酸测定的干扰。

关键词: 对羟基苯甲酸, 抗坏血酸, 电催化, 伏安法

Abstract:

Poly(para-hydroxybenzoic acid) (poly-PHB) modified glassy carbon electrode was prepared by cyclic voltammetry. The electrocatalytic activity of ascorbic acid(AA) was explored at the poly-PHB GCE. The results showed a good electrocatalytic ability for AA and current increased on the film modified GCE. The peak potential was shift negatively from 0. 2383 V to 0.0496 V. A linear relationship existed between the catalytic current and the AA concentration in the range of 2.6 ×10-5 to 3.68 ×10-4 mol/L with a correlation coefficient of 0.9984 (n = 11). The detection limit (S/N = 3) was 5×10- 6 mol/L. The poly-PHB GCE exhibited an effective and fast catalytic response to the oxidation of AA with good reproducibility and stability.

Key words: para-hydroxybenzoic acid, ascorbic acid, electrocatalysis, voltammetry

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