Potentiometric glucose biosensing using camphor sulfonic acid doped polyaniline
In this work, we explored the possibility of developing an enzymatic potentiometric glucose biosensor using polyaniline–camphorsulfonic acid–glucose oxidase (PANI–CSA–GOD) composite films. Glucose oxidase was covalently immobilized on the polyaniline–camphorsulfonic acid modified electrode that was used as a potentiometric sensor matrix. The PANI–CSA–GOD transducer responded linearly to glucose molecules in the concentration range of 1 to 50 mM and the sensitivity was found to be 0.09 mV mM−1. The modified electrode showed excellent sensitivity and better selectivity in the presence of some common interfering molecules.