The novel enzyme electrode was made by chemically bonding both the redox mediator
ferrocenecarboxaldehyde and glucose oxidase to a gold-particles modified pencil lead carbon electrode
that possessed the widest linear standard calibration concentration range of 0–39.0 mM (r2 = 0.9956), a
limit of detection of 7.8 lM, fast response time of 5 s, and a detection sensitivity of 2212 nA mM 1.
novel
mediator
pencil lead possessed widest