食品科学 ›› 2013, Vol. 34 ›› Issue (6): 14-18.doi: 10.7506/spkx1002-6630-201306004

• 工艺技术 • 上一篇    下一篇

SiO2球腔微电极阵列过氧化氢传感器制备及应用

李建鑫1,2,尹凡2,*,吴向阳1,吴静萍2,3,徐玉兰2   

  1. 1.江苏大学化学与化工学院,江苏 镇江 212013;2.江苏省新型功能材料重点建设实验室,江苏 常熟 215500;3.苏州大学药学院,江苏 苏州 215123
  • 收稿日期:2011-11-19 修回日期:2013-01-24 出版日期:2013-03-25 发布日期:2013-03-01
  • 通讯作者: 尹凡 E-mail:jscsyf@msn.com
  • 基金资助:
    国家自然科学基金项目;江苏省自然科学基金:不同腌制工艺对低温肉制品品质形成的作用机理研究

Preparation and Application of Hydrogen Dioxide Biosensor Based on Microelectrode Array of SiO2 Cavity

LI Jian-xin1,YIN Fan2,*,WU Xiang-yang1,WU Jing-ping2,3,XU Yu-lan2   

  1. 1. College of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China;2. Jiangsu Laboratory of Advanced Functional Materials, Changshu 215500, China;3. College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
  • Received:2011-11-19 Revised:2013-01-24 Online:2013-03-25 Published:2013-03-01

摘要: 将微过氧化物酶-11(MP-11)直接固定于二氧化硅球腔微电极阵列,制备一种新型电化学过氧化氢(H2O2)生物传感器。采用Langmuir-Blodgett技术在氧化铟锡(ITO)电极表面制备聚苯乙烯(PS)微球阵列,并以此阵列为模板采用溶胶-凝胶法在ITO电极上制备二氧化硅(SiO2)球腔阵列,最后将微过氧化物酶-11作为氧化还原模型蛋白直接吸附于球腔内,制得MP-11/SiO2球腔阵列/ITO电极。该电极对H2O2响应快速灵敏,可作为电流型H2O2电化学生物传感器,其线性范围为7.06×10-6~4.02×10-2mol/L,检出限为3.0×10-7mol/L,米氏常数为0.916mmol/L。将该法用于食品样品中的H2O2的检测,回收率在94%~97%之间,效果良好,可为食品中残存的H2O2检测提供一种方法。

关键词: 过氧化氢, 溶胶-凝胶法, 二氧化硅球腔, 微电极阵列, 微过氧化物酶-11, 生物传感器

Abstract: A new biosensor for the detection of H2O2 was prepared by immobilizing microperoxidase-11 (MP-11) onto silicon dioxide (SiO2) cavity array directly. Polystyrene (PS) particle array was constructed on indium-tin oxide (ITO) electrode surface by Langmuir-Blodgett technique. The silicon dioxide cavity array was prepared by Langmuir-Blodgett technique using PS particle array as the template. Using MP-11 as a model protein, MP-11/SiO2 cavity array-ITO electrode was prepared by adsorbing MP-11 into SiO2 cavity. The fast response of the biosensor against H2O2 was observed. A linear relationship between current response and H2O2 concentration ranging from 7.06 × 10-6 to 4.02 × 10-2 mol/L was achieved with a detection limit of 3.0 × 10-7 mol/L. The apparent Michaelis-Menten constant was 0.916 mmol/L. This established method is satisfactory for the determination of hydrogen peroxide in food samples with a recovery rate varying from 94% to 97%.

Key words: hydrogen peroxide, sol-gel technique, silicon dioxide cavity, microelectrode array, microperoxidase-11, biosensor

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