高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (10): 1820.

• 研究论文 • 上一篇    下一篇

基于等离子体聚合膜固定酶的H2O2生物传感器

刘兵, 阳明辉, 杨海峰, 沈国励, 俞汝勤   

  1. 湖南大学化学化工学院化学生物传感与计量学国家重点实验室, 长沙410082
  • 收稿日期:2003-09-08 出版日期:2004-10-24 发布日期:2004-10-24
  • 基金资助:

    国家自然科学基金(批准号:20375012,20075006,20205004);教育部博士学科点基金(批准号:20010532008);湖南省自然科学基金(批准号:01JJY1003,01JJY2099)资助

A Biosensor for Hydrogen Peroxide Based on Peroxidase Immobilized by Plasma Polymerized Film

LIU Bing, YANG Ming-Hui, YANG Hai-Feng, SHEN Guo-Li, YU Ru-Qin   

  1. State Key Laboratory of Chem./Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
  • Received:2003-09-08 Online:2004-10-24 Published:2004-10-24

摘要: 以玻碳电极为基础电极,用微波等离子体技术聚合沉积聚乙二胺等离子体膜,使之形成带氨基功能团的表面,再通过戊二醛交联共价固定辣根过氧化物酶,制得H2O2生物传感器.探讨了等离子体聚合膜的形成条件(如放电功率、单体流速、单体气压和聚合时间),讨论了工作电位、介体浓度和pH值对传感器响应的影响.此外,用红外光谱对等离子体聚合膜进行了表征.该传感器在5×10-7~1.1×10-3mol/LH2O2浓度范围内有线性响应,最低检测限为0.3μmol/L.将此传感器用于实际试样回收率的测定,结果良好.

关键词: 微波等离子体聚合, 过氧化氢, 辣根过氧化物酶, 生物传感器

Abstract: A biosensor for hydrogen peroxide assay based on glassy-carbon electrode with plasma polymerized polyethylene diamine film was proposed. Plasma polymerization technique was utilized to make amino groups deposit on the surface of glassy-carbon electrode for an oriented covalent attachment of HRP. The conditions of plasma polymerization including applied power for polymerization, pressure, plasma exposure time and flow rates were studied. The effects of experimental variables such as the operating potential of the working electrode, mediator concentration and pH of the measured solution were investigated for the optimum analytical performance by using an amperometric method, and the plasma polymerized polyethylene diamine film was examined by Fourier transform infrared spectroscopy. The biosensor provided a linear response to hydrogen peroxide over a concentration range of 5×10-7—1.1×10-3 mol/L and a detection limit of 0.3 μmol/L. The recovery studies for H2O2 in the real samples gave satisfactory results.

Key words: Miccrowave plasma polymerization, Hydrogen peroxide, Horseradish peroxidase(HRP), Biosensor

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