Test strips for detecting the presence of a reduced cofactor...

C - Chemistry – Metallurgy – 12 – Q

Patent

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C12Q 1/26 (2006.01) G01N 33/52 (2006.01)

Patent

CA 2422010

Test strips and methods for their use in the detection of an analyte in a sample are provided. The subject test strips are characterized by at least including a water soluble tetrazolium salt on a surface of a positively charged substrate. In many embodiments, the water soluble tetrazolium salt is present as part of an analyte oxidizing signal producing system, which system includes one or more of the following additional components: an analyte oxidizing enzyme, e.g., an analyte dehydrogenase or an analyte oxidase; an electron transfer agent; and an enzyme cofactor. Also provided are systems and kits incorporating the subject test strips. The subject test strips, systems and kits find use in the measurement of a wide variety of analytes in a sample, such as a physiological sample, e.g., blood or a fraction thereof.

L'invention concerne des bandes test et des procédés d'utilisation de ces dernières dans la détection d'un analyte dans un échantillon. Les bandes test se caractérisent en ce qu'elles contiennent un sel de tétrazolium hydrosoluble sur une surface d'un substrat à charge positive. Dans de nombreux modes de réalisation, le sel de tétrazolium hydrosoluble fait partie d'un système de production de signaux d'oxydation d'analytes. Le système comprend un ou plusieurs des composants additionnels suivants : une enzyme d'oxydation d'analytes, p. ex. une analyte déhydrogénase ou une analyte oxydase, un agent de transfert d'électrons, et un co-facteur enzymatique. L'invention concerne également des systèmes et des kits comprenant les bandes test précitées. Ces dernières, ainsi que les systèmes et les kits sont utiles pour mesurer un large éventail d'analytes dans un échantillon, tel qu'un échantillon physiologique comme le sang ou une fraction sanguine.

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