Glucose oxidation by enzyme electrodes using genipin to crosslink chitosan, glucose oxidase and amine-containing osmium redox complexes

Genipin is used to simultaneously crosslink chitosan, amine-containing osmium redox complex and glucose oxidase on graphite disks to produce enzyme-based electrodes for glucose oxidation. The enzyme electrodes produce glucose oxidation current densities of 730 µA cm−2 in 50 mM phosphate buffered saline (150 mM NaCl, pH 7.4, 37 °C) containing 100 mM glucose at an applied potential of 0.45 V (vs. Ag/AgCl), higher than the 440 µA cm−2 for...