Abstract
Selective biosensor systems for determination of heavy metal ions based on ion sensitive field effect transistors and thin-film interdigitated planar (conductometric) electrodes have been developed. Glucose oxidase, alcohol oxidase and butyril cholinesterase immobilised on the transducer surfaces have been used as bioactive elements for preparation of Ag+, Hg2+ and Pb2+ sensitive biosensors. The biosensors developed exhibit a dynamic range of 1 – 100 μM for these heavy metal ions. The performance characteristics of the biosensors are discussed.
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