Biosensor

G - Physics – 01 – N

Patent

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Details

G01N 27/327 (2006.01) G01N 27/416 (2006.01)

Patent

CA 2658036

A biosensor for use in the determination of the glucose level in a liquid sample, which comprises an insulating substrate and a reagent layer provided on the insulating substrate and comprising a glucose dehydrogenase whose coenzyme is flavin-adenine dinucleotide, wherein the reagent layer contains an additive comprising any one selected from an organic acid or organic acid salt having at least one carboxyl group in the molecule, an organic acid or organic acid salt having at least one amino or carbonyl group in the molecule, a sugar alcohol and a soluble protein or a combination thereof. It becomes possible to improve the substrate specificity to glucose and the storage stability and to avoid any action on a sugar other than glucose.

L'invention concerne un biocapteur destiné à être utilisé dans la détermination du taux de glucose dans un échantillon de liquide, ce biocapteur comprenant un substrat isolant sur lequel est formée une couche de réactif et une glucose déshydrogénase dont la coenzyme est un flavine adénine dinucléotide. La couche de réactif contient un additif comprenant un acide ou sel quelconque sélectionné parmi un acide organique ou un sel d'acide organique ayant au moins un groupe carboxyle dans la molécule, un acide organique ou un sel d'acide organique possédant au moins un groupe amino ou carboxyle dans la molécule, un alcool glucidique et une protéine soluble ou une combinaison de ceux-ci. Il est alors possible d'améliorer la spécificité du substrat par rapport au glucose et la stabilité au stockage, et d'éviter toute action sur un sucre autre que le glucose.

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