Electrochemistry of the polypyrrole glucose oxidase electrode

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Abstract

A polypyrrole-glucose oxidase electrode prepared by anodic polymerization of pyrrole and glucose oxidase with KCl aqueous electrolyte on a platinum electrode showed redox behaviour in aqueous pure supporting electrolyte. The electrochemistry of the polypyrrole-glucose oxidase electrode resembled closely that of a polypyrrole electrode prepared from an aqueous solution containing only pyrrole and KC1. The amperometric response to glucose was generated by electrochemical oxidation of enzymatically produced hydrogen peroxide and was observed only after the loss of polypyrrole electroactivity. The results presented in this paper indicate that polypyrrole served only as an immobilization matrix to glucose oxidase in the polypyrrole-glucose oxidase electrode.

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