CONCENTRATION DETERMINATION IN A DIFFUSION BARRIER LAYER
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Abstract
The present invention relates to improved electrochemical biosensor strips and methods for determining the concentration of an analyte in a sample. By selectively measuring a measurable species residing in a diffusion barrier layer, to the substantial exclusion of the measurable species residing exterior to the diffusion barrier layer, measurement errors introduced by sample constituents, such as red blood cells, and manufacturing variances may be reduced.
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Citations
40 Claims
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1-20. -20. (canceled)
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21. An electrochemical test sensor, comprising:
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a base; a first electrode structure coupled to the base, the first electrode structure including a first layer structure coupled to a first conductor, the first layer structure including a first reagent layer and a diffusion barrier layer, the diffusion barrier layer having a porous space with an internal volume, the porous space configured to diffuse a measurable species into the internal volume; and a second electrode structure coupled to the base. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An electrochemical test sensor for measuring an analyte in a fluid sample, the electrochemical test sensor comprising:
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an electrically insulating base; a first electrode structure mounted on the base, the first electrode structure comprising a diffusion barrier layer mounted on a first conductor, and a first reagent layer mounted on the diffusion barrier layer, the diffusion barrier layer comprising an at least partially water-soluble polymeric material having a porous space with an internal volume configured to store therein a measurable species, the porous space configured to diffuse a fluid sample with the measurable species into the internal volume; and a second electrode structure mounted on the base, the second electrode structure having a second reagent layer mounted on a second conductor.
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34. A method of assembling an electrochemical test sensor, the method comprising:
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receiving a base; coupling a first electrode structure to the base, the first electrode structure including a first layer structure coupled to a first conductor, the first layer structure including a first reagent layer and a diffusion barrier layer, the diffusion barrier layer having a porous space with an internal volume, the porous space configured to diffuse a measurable species into the internal volume; and coupling a second electrode structure to the base. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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Specification