高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (08): 1708.doi: 10.3969/j.issn.0251-0790.2012.08.014

• 分析化学 • 上一篇    下一篇

以马来松香丙烯酸乙二醇酯为交联剂的咖啡因分子印迹电化学传感器

王琳1,2, 谭学才1,2, 赵丹丹1, 刘力1, 雷福厚1, 黄在银1, 龚琦2   

  1. 1. 广西民族大学化学化工学院, 广西林产化学与工程重点实验室, 广西高校化学与生物转化过程重点实验室, 南宁 530008;
    2. 广西大学化学化工学院, 南宁 530004
  • 收稿日期:2011-08-24 出版日期:2012-08-10 发布日期:2012-08-10
  • 通讯作者: 谭学才, 男, 博士, 教授, 主要从事电分析化学研究. E-mail: xctan@yahoo.cn E-mail:xctan@yahoo.cn
  • 基金资助:

    国家自然科学基金(批准号: 21065001, 30960306, 21165003); 广西自然科学基金项目(批准号: 0991084, 0991001z)和广西教育厅科研项目(批准号: 200812MS074)资助.

Electrochemical Sensor for Caffeine Detection Based on Molecularly Imprinted Polymer with Maleic Rosin Acrylic Acid Glycol Ester as Cross-linker

WANG Lin1,2, TAN Xue-Cai1,2, ZHAO Dan-Dan1, LIU Li1, LEI Fu-Hou1, HUANG Zai-Yin1, GONG Qi2   

  1. 1. School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Key Laboratory of Chemical and Biological Transforming Process in Universities of Guangxi, Nanning 530008, China;
    2. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
  • Received:2011-08-24 Online:2012-08-10 Published:2012-08-10

PDF (PC)

被引次数

23

摘要： 以咖啡因为模板分子, 含菲环骨架的马来松香丙烯酸乙二醇酯为交联剂, 甲基丙烯酸为功能单体, 在玻碳电极表面以自由基热聚合的方式制备分子印迹聚合物敏感膜, 构建了测定咖啡因的新型分子印迹膜电化学传感器. 通过循环伏安法、 差分脉冲伏安法及电化学交流阻抗法研究了传感器对咖啡因的响应特性. 结果表明, 在最佳的实验条件下, 传感器的峰电流与咖啡因浓度在3.00×10-3~2.73 mmol/L范围内呈现良好的线性关系, 检出限(S/N=3)为1.12×10-4 mmol/L. 传感器具有良好的选择性和重现性. 将该传感器用于可口可乐饮料中咖啡因含量的测定, 平均回收率为98.7%.

关键词: 马来松香丙烯酸乙二醇酯, 咖啡因, 分子印迹聚合物, 电化学传感器

Abstract: A novel polymer based on the molecular imprinting technique was prepared using ethylene glycol maleic rosinate acrylate acid glycol ester as the cross-linker, caffeine as template and methyl acrylic acid as functional monomer. A molecularly imprinted polymer membrane was synthesized in vacuum drying oven by free radical polymerization. The electrochemical behavior of the membrane was characterized by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). Under the optimal conditions, the peak currents and the analytical concentration have a good linear relationship over the range of 3.00?10-3 to 2.73 mmol/L(R=0.9966) with a detection limit of 1.12?10-4 mmol/L(S/N=3). The electrochemical sensor displayed excellent repeatability, high sensitivity, long-term stability, and good selectivity. The developed sensor was successfully applied to the determination of caffeine in coca-cola samples with average recovery of 98.7%.

Key words: Maleic rosin acrylic acid glycol ester, Caffeine, Molecularly imprinted polymer, Electrochemical sensor

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