Glucose oxidase electrodes of polyaniline, poly(<i>o</i>‐toluidine) and their copolymer as a biosensor: a comparative study

Abstract

Abstract A simple technique is described for constructing a glucose sensor by the entrapment of glucose oxidase (GOD) in a polyaniline (PA), poly( o ‐toluidine) (POT) and their copolymer poly(aniline‐co‐ o ‐toluidine) (PA‐co‐POT) thin films, which were electrochemically deposited on a platinum plate in phosphate and acetate buffer. The maximum current response was observed for PA, POT, and PA‐co‐POT GOD electrodes at pH 5.5 and potential 0.60 V ( v . Ag/AgCl). The phosphate buffer gives fast response as compared to acetate buffer in amperometric measurements. PA GOD electrode shows the fastest response followed by PA‐co‐POT and POT GOD electrodes. Copyright © 2004 John Wiley &amp; Sons, Ltd.