A porous poly(acrylonitrile-co-acrylic acid) film-based glucose biosensor constructed by electrochemical entrapment |
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Authors: | Shan Dan He Yuanyuan Wang Shanxia Xue Huaiguo Zheng Hao |
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Affiliation: | School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China. |
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Abstract: | A novel glucose biosensor was constructed by electrochemical entrapment of glucose oxidase (GOD) into porous poly(acrylonitrile-co-acrylic acid), which was synthesized via radical polymerization of acrylonitrile and acrylic acid. The obtained biosensor showed a better stability and higher sensitivity than the biosensor prepared by simple physical adsorption. Effects of some experimental variables such as immobilization time, enzyme concentration, pH, applied potential, and temperature on the amperometric response of the sensor were investigated. The biosensor exhibited a rapid response to glucose (< 30s) with a linear range of 5 x 10(-6) to 3 x 10(-3)M and a sensitivity of 6.82 mAM(-1)cm(-2). The apparent Michaelis-Menten constant (K(M)(app)) was 7.3mM. |
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Keywords: | Glucose biosensor Electrochemical entrapment Poly(acrylonitrile-co-acrylic acid) Porous film Copolymer |
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