Biosensor with improved analyte specificity

C - Chemistry – Metallurgy – 12 – Q

Patent

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C12Q 1/00 (2006.01) C12Q 1/32 (2006.01) G01N 33/66 (2006.01)

Patent

CA 2719255

A chemistry matrix for use in determining the concentration of an analyte in a biological fluid includes a glucose dehydrogenase, nicotinamide adenine dinucleotide, an alkylphenazine quaternary salt, and a nitrosoaniline. The chemistry matrix is used with an electrochemical biosensor to determine the concentration of an analyte after a reaction occurs within the biosensor, at which time an analysis is completed to determine the concentration. A method of determining the concentration of an analyte using the chemistry matrix of glucose dehydrogenase, nicotinamide adenine dinucleotide, an alkylphenazine quaternary salt, and a nitrosoaniline is another aspect that is described. The method also further features test times of five seconds or less. Methods utilizing the new chemistry matrix can readily determine an analyte such as blood glucose at concentrations of from about 20-600 mg/dL at a pH of from about 6.5 to about 8.5.

Linvention concerne une matrice chimique destinée à être utilisée dans la détermination de la concentration dun analyte dans un fluide biologique qui inclut une déshydrogénase de glucose, un dinucléotide dadénine et de nicotinamide, un sel quaternaire dalkylphénazine et une nitrosoaniline. La matrice chimique est utilisée avec un biocapteur électrochimique pour déterminer la concentration dun analyte après quune réaction se soit produite dans le biocapteur, moment auquel une analyse est terminée pour déterminer la concentration. Linvention concerne également un procédé de détermination de la concentration dun analyte en utilisant la matrice chimique dune déshydrogénase de glucose, dun dinucléotide dadénine et de nicotinamide, dun sel quaternaire dalkylphénazine et dune nitrosoaniline. Le procédé comporte également en outre des durées de test de cinq secondes ou moins. Les procédés utilisant la nouvelle matrice chimique peuvent déterminer facilement un analyte comme le glucose dans le sang à des concentrations allant denviron 20 à 600 mg/dl à un pH denviron 6,5 à environ 8,5.

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