Development of a bienzymic graphite–Teflon composite electrode for the determination of hypoxanthine in fish

Selective and Sensitive Biosensor for Theophylline Based on Xanthine Oxidase Electrode

“…The application of 5% trehalose to the enzyme solution during the biosensor fabrication resulted in an excellent biosensor stability, when loss of the initial sensitivity after 4 months was negligible. The presented stability is much better than that claimed for the theophylline oxidase electrode (18) and comparable to or better than those reported for milk XO-based biosensors developed for fish freshness determination (7)(8)(9).…”

Electrocatalytic Oxidation of Hypoxanthine on a Nafion/Lead-Ruthenium Oxide Pyrochlore Modified Electrode

“…In the past, the quantitative Hx assay was made by measuring the O 2 consumed [4±6] or the H 2 O 2 formed [3,7] after XOD enzymatic action. Monitoring O 2 consumption requires the use of two gas-only permeable membranes and as the membrane layer becomes thicker the response and recovery become complicated.…”

Graphite-teflon-tyrosinase composite electrodes for the monitoring of phenolic compounds in predominantly non aqueous media

“…Fabrication of amperometric electrodes by incorporation of enzymes into the bulk of rigid composite electrode matrices constructed with graphite and Teflon has demonstrated to possess several practical advantages with respect to other designs [1,2]. Three-dimensional biocomponent reservoirs are obtained, whose surface can be easily regenerated by polishing.…”