Electrode with thin working layer
First Claim
1. A sensor for measuring glucose in a sample of blood, said sensor comprising an electrode arrangement, which comprises an electrode support having at least one printed track of electroconductive carbon ink, said at least two printed tracks defining the positions of at least two electrodes, one of said at least two electrodes comprising a thin working layer, said thin working layer having a thickness in the range of 2 to 10 microns, said thin working layer comprising a printed ink, said ink comprising an enzyme and a redox mediator, the other of said at least two electrodes being a reference electrode, said sensor, in the presence of a sample of blood, having a response slope that remains substantially constant in said thickness range.
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Accused Products
Abstract
Disclosed is an improved electrode for use in an electrochemical sensor for measuring an analyte in a sample. The electrode includes a thin working layer whose thickness is from 2 to 10 microns. Also disclosed is an electrode strip that includes an electrode with a thin working layer. Typically, the thin working layer includes an enzyme and a redox mediator. In an electrode for measuring glucose, the enzyme can be glucose oxidase and the redox mediator can be ferrocene.
646 Citations
12 Claims
- 1. A sensor for measuring glucose in a sample of blood, said sensor comprising an electrode arrangement, which comprises an electrode support having at least one printed track of electroconductive carbon ink, said at least two printed tracks defining the positions of at least two electrodes, one of said at least two electrodes comprising a thin working layer, said thin working layer having a thickness in the range of 2 to 10 microns, said thin working layer comprising a printed ink, said ink comprising an enzyme and a redox mediator, the other of said at least two electrodes being a reference electrode, said sensor, in the presence of a sample of blood, having a response slope that remains substantially constant in said thickness range.
Specification