Fig. 9From: A Novel Amperometric Glutamate Biosensor Based on Glutamate Oxidase Adsorbed on SilicaliteReproducibility of biosensor responses to 0.5 mM (1) and 1 mM (2) glutamate during one working day (a) and operational stability of the biosensor responses to 1 mM glutamate during four days (b). Measurements in 25 mM HEPES buffer, pH 7.4, at a constant potential of +0.6 V vs Ag/AgCl reference electrodeBack to article page