An enzymatic glucose biosensor based on the codeposition of rodhium, iridium and glucose oxidase onto a glassy carbon transducer

MARCELA C. RODRIGUEZ; GUSTAVO A. RIVAS

ANALYTICAL LETTERS

Taylor & Francis

Lugar: Philadelphia; Año: 2001 vol. 34 p. 1829 - 1829

0003-2719

font lang="en" face="AdvTimes" size="2"> The performance of a first-generation glucose biosensor based on the entrapment of glucose oxidase (GOx) within a net of iridium and rhodium codeposited onto activated glassy carbon electrode, is described. The presence of rhodium in the plating solution allows the deposition of iridium and GOx under conditions at which this is not possible without rhodium. The electrocatalytic activity of the bioelectrode containing both metals towards the oxidation and reduction of hydrogen peroxide improves drastically compared to those of the bioelectrodes containing GOx and iridium or rhodium. The sensitivity for glucose obtained with Ir-Rh-GOx/GCE is almost seven times higher than that obtained for Rh-GOx/GCE and by far higher than that f