BIOSENSORS FOR DETECTING NITRATE OR NITRITE IONS

摘要

A biosensor which comprises a biochemical capable of producing a biochemical reaction in the presence of nitrate or nitrite ions and a transducer arranged to detect a transducible output agent produced directly or indirectly by the reaction produced by the biochemical in the presence of nitrate or nitrite ions, the biochemical comprising a reductase for the nitrate or nitrite ions and a co-factor which is oxidised by reduction of the nitrate or nitrite ions and characterised in that the biochemical includes a photoluminescent ingredient which produces as the said output agent photons directly or indirectly by oxidation of the said co-enzyme and that the said transducer comprises a photodetector.