SOL-GEL-DERIVED METAL-DISPERSED CARBON COMPOSITE AMPEROMETRIC BIOSENSORS

The advantages which accrue from the coupling of sol-get enzyme electr ode preparation processes with the dispersion of electrocatalytic meta l centers are described. in particular, ruthenium-dispersed sol-gel ca rbon thick-film bioelectrodes couple the low-temperature curing proces s with the elimination of contributions from easily oxidizable interfe ring species. The remarkable selectivity towards the glucose substrate is combined with a greatly enhanced sensitivity. Factors influencing the performance of these sol-gel-derived metal-doped enzyme strips are discussed.