Hydrogen peroxide biosensor with enzyme entrapped within electrodeposited polypyrrole based on mediated sol–gel derived composite carbon electrode Original Research Article

A novel amperometric biosensor for the detection of hydrogen peroxide was described. The biosensor was constructed by electrodepositing HRP/PPy membrane on the surface of ferrocenecarboxylic acid mediated sol–gel derived composite carbon electrode. The biosensor gave response to hydrogen peroxide in a few seconds with detection limit of 5.0×10−5 M (based on signal:noise=3). Linear range was upto 0.2 mM. The biosensor exhibited a good stability.