高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (12): 2253.

• 研究简报 • 上一篇    下一篇

塑料芯片毛细管电泳电化学检测系统及其性能评价

陈志锋1, 高云华1, 李成武1, 林金明2   

  1. 1. 中国科学院理化技术研究所, 北京100101;
    2. 中国科学院生态环境研究中心, 北京100085
  • 收稿日期:2003-09-06 出版日期:2004-12-24 发布日期:2004-12-24
  • 基金资助:

    国家高技术研究发展计划项目(批准号:2001AA630503);国家自然科学基金(批准号:20275042);中国科学院“百人计划”项目资助

Configuration and Property Evaluation of a Novel Plastic Capillary Electrophoresis Microchip with Electrochemical Detection System

CHEN Zhi-Feng1, GAO Yun-Hua1, LI Cheng-Wu1, LIN Jin-Ming2   

  1. 1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China;
    2. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100058, China
  • Received:2003-09-06 Online:2004-12-24 Published:2004-12-24

关键词: 聚甲基丙烯酸甲酯, 毛细管电泳芯片, 电化学检测, 微盘电极

Abstract: A poly(methyl methacrylate)-based capillary electrophoresis microchip, integrated with a microelectrode-based end-column amperometric detection, was described. A short unclosed portion of the separation channel from the detection cell was used as a working-electrode guide channel. With the aid of a three-dimension micropositioner and an optical microscope, a home-made 6 μm carbon-fiber microdisk electrode(tip diameter of 20 μm) was positioned along the guide channel at 30 μm distance from the channel outlet. With dopamine and catechol the as model analytes, the analytical performance of the system was demonstrated and the detection limit of 1.6×10-7mol/L for dopamine was achieved, to our knowledge, which is the lowest value than that from published literatures using electrophoresis microchip with end-column amperometric detection.

Key words: Poly(methyl methacrylate), Capillary electrophoresis microchip, Electrochemical detection, Microdisk electrode

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