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双酚A在SDS现场自组装膜与[bupy]PF6复合修饰碳糊电极上的电催化氧化及电分析方法

张艳梅1,段成茜1,2,高作宁1*   

  1. (1.宁夏大学能源化工重点实验室化学化工学院银川 750021；
    2.宁夏医科大学高等卫生职业技术学院 银川)
  • 收稿日期:2011-04-21 修回日期:2011-07-16 出版日期:2012-03-10 发布日期:2012-03-10
  • 通讯作者: 高作宁,教授; Tel:0951-2062066; Fax:0951-2062860; E-mail:gaozn@nxu.edu.cn; 研究方向：电化学与生物电化学

Electrocatalytic oxidation of Bisphenol A at SDS self-assembled monolayers and [bupy]PF6 modified carbon paste electrode and its electrochemical determination

ZHANG Yanmei1, DUAN Chengqian1,2, GAO Zuoning1*   

  1. (1.Key Laboratory of Energy Sources and Chemical Engineering,College of Chemistry and
    Chemical Engineering,Ningxia University,Yinchuan 750021;
    2.Chemical Teaching and Research Section of Higher Vocational College,Ningxia Medical University,Yinchuan)
  • Received:2011-04-21 Revised:2011-07-16 Published:2012-03-10 Online:2012-03-10
  • Contact: Zuo-Ning Gao
  • About author:

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摘要： 研究了双酚A(BPA)在十二烷基硫酸钠(SDS)现场自组装膜与离子液体N-丁基吡啶六氟磷酸盐([bupy]PF6)复合修饰碳糊电极(SDS-[bupy]PF6/CPE)上的电催化氧化行为和电化学动力学性质。 实验结果表明，在SDS-[bupy]PF6/CPE上BPA发生了一受扩散控制的不可逆电化学氧化过程，用循环伏安(CV)法和计时电流(CA)法测得BPA在SDS-[bupy]PF6/CPE上的电极反应过程动力学参数。 用方波伏安(SWV)法测得BPA氧化峰电流(Ipa)与其浓度在1.0×10-5~1.0×10-3 mol/L范围内呈良好的线性关系，线性方程为Ipa(μA)=2.635+51.30c(10-3 mol/L),r=0.9981，检测限(S/N=3)为3.01×10-7 mol/L，同时运用SWV法对湖水样品中双酚A的含量进行了电化学定量测定。

关键词: 双酚A, 十二烷基硫酸钠, N-丁基吡啶六氟磷酸盐, 碳糊电极, 电催化氧化

Abstract: The electrocatalytic oxidation and electrochemical kinetics of bisphenol A(BPA) were investigated at sodium dodecyl sulphate(SDS) self-assembled monolayer and N-butylpyridinium hexafluorophosphate([bupy]PF6) modified carbon paste electrode(CPE). The experimental results indicated that BPA electrochemical behavior exhibited an irreversible electrochemical oxidation process at SDS-[bupy]PF6/CPE. The electrochemical kinetic parameters were determined by cyclic voltammetry(CV), chronoamperometry(CA). The oxidation peak current of BPA had a good linear relationship with the concentration of BPA in the range of 1.0×10-5~1.0×10-3 mol/L with a correlation coefficient of 0.9981, and a detection limit of 3.01×10-7 mol/L(S/N=3) was obtained by square wave voltammetry(SWV). The method was applied to determine quantitative BPA content in lake water samples with satisfactory results.

Key words: bisphenol A, sodium dodecyl sulphate, N-Butylpyridinium hexafluorophosphate, carbon paste electrode, electrocatalytic oxidation

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