Glucose Biosensor Prepared by the Deposition of Iridium and Glucose Oxidase on Glassy Carbon Transducer

MARCELA C. RODRIGUEZ; GUSTAVO A. RIVAS

ELECTROANALYSIS

Wiley Interscience

Lugar: Weinheim; Año: 1999 p. 558 - 558

1040-0397

font face="AdvP7B6C" size="1"> A first generation glucose biosensor based on the electrodeposition of iridium and glucose oxidase (GOx) on pretreated glassy carbon is described. The strong electrocatalytic action of iridium towards hydrogen peroxide allows fast glucose quantification at very low potentials where the interference of easily oxidizable compounds such as ascorbic and uric acids is minima. The influence of electrode pretreatment, plating solution composition and deposition time on the analytical performance and kinetic behavior of the bioelectrodes is studied. In all the cases the bioelectrodes response was measured using hydrogen peroxide and glucose in order to evaluate how the experimental conditions affect both iridium and GOx deposition. A long-term stability study showed that the sens