Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (9): 1088-1094.DOI: 10.6023/A1108232 Previous Articles     Next Articles

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谭学才a,b, 王琳b, 李鹏飞a, 龚琦b, 刘力a, 赵丹丹a, 雷福厚a, 黄在银a   

  1. a. 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;
    b. 广西大学化学化工学院 南宁 530004
  • 投稿日期:2011-08-23 修回日期:2012-04-09 发布日期:2012-04-18
  • 通讯作者: 谭学才
  • 基金资助:

    国家自然科学基金(Nos. 21065001, 30960306, 21165003)、广西自然科学基金(Nos. 0991084, 0991001z)、广西教育厅科研(Nos. 200812MS074)、广西林产化学品开发与应用重点实验室(No. GXFC08-06)资助项目.

Electrochemical Sensor for the Determination of Theophylline Based on Molecularly Imprinted Polymer with Ethylene Glycol Maleic Rosinate Acrylate as Cross-linker

Tan Xuecaia,b, Wang Linb, Li Pengfeia, Gong Qib, Liu Lia, Zhao Dandana, Lei Fuhoua, Huang Zaiyina   

  1. a. 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;
    b. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004
  • Received:2011-08-23 Revised:2012-04-09 Published:2012-04-18
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 21065001, 30960306, 21165003), Guangxi Natural Science Foundation (Nos. 0991084, 0991001z), Scientific Reserch Fund of Guangxi Education Department (Nos. 200812MS074) and Guangxi Key Laboratory of Chemistry and Engineering of Forest Products (No. GXFC08-06).

A novel electrochemical sensor for the determination of theophylline based on ethylene glycol maleic rosinate acrylate as the cross linking agent and acrylic acid as functional monomer was fabricated by molecularly imprinted technology. A molecularly imprinted polymers (MIPs) membrane was synthesized on the surface of a glassy carbon electrode in vacuum drying oven by free radical polymerization method. The electrochemical behavior of the membrane was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry. Under optimum conditions, it was found that the response of peak currents was linear to the concentration of theophylline in range of 2.00×10-7~3.45×10-4 mol/L (linear regression coefficient=0.9961) with the detection limit of 1.00×10-7 mol/L. The sensor not only has high selectivity, but also shows good stability and reproducibility. The sensor was applied to the determination of theophylline in theophylline sustained release tablets samples with recovery ranging from 95.6% to 103.8%.

Key words: ethylene glycol maleic rosinate acrylate, theophylline, molecularly imprinted polymer, electrochemical sensor