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

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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

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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