Electrochemical test strip for reducing the effect of direct interference current
First Claim
1. An electrochemical sensor comprising:
- a substrate;
a first working electrode disposed on said substrate;
a second working electrode disposed on said substrate;
a reference electrode; and
a reagent layer disposed on said first working electrode, wherein said reagent layer completely covers said first working electrode;
said second working electrode including a covered portion and an uncovered portion wherein said covered portion of said second working electrode is covered by said reagent layer.
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Abstract
This invention describes an electrochemical sensor which is adapted to reduce the effects of interfering compounds in bodily fluids when measuring an analyte in such fluids using an electrochemical strip. The sensor includes a substrate, a first and second working electrodes, and a reference electrode. A reagent layer is disposed on the electrodes such that, in one embodiment it completely covers all of the first working electrode, but only partially covers the second working electrode and, in a second embodiment, it only covers a portion of the first and the second working electrode. The portion of the working electrodes not covered by the reagent layer and is used to correct for the interference effect on the analyte measurement.
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Citations
14 Claims
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1. An electrochemical sensor comprising:
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a substrate;
a first working electrode disposed on said substrate;
a second working electrode disposed on said substrate;
a reference electrode; and
a reagent layer disposed on said first working electrode, wherein said reagent layer completely covers said first working electrode;
said second working electrode including a covered portion and an uncovered portion wherein said covered portion of said second working electrode is covered by said reagent layer. - View Dependent Claims (2, 3, 4, 5, 6, 13)
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7. An electrochemical sensor comprising:
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a substrate;
a first working electrode disposed on said substrate;
a second working electrode disposed on said substrate;
a reference electrode; and
a reagent layer disposed on a portion said first working electrode and said second working electrode;
said first working electrode having a reagent coated area and an uncoated area; and
said second working electrode having a reagent coated area and an uncoated area. - View Dependent Claims (8, 9, 10, 11, 12, 14)
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Specification