Interferant eliminating biosensor
First Claim
Patent Images
1. A biosensor comprising:
- an electrode on which an analyte is electrooxidized at a given applied potential; and
an interferant-eliminating layer substantially covering the electrode but electrically isolated therefrom at the given applied potential,said interferant-eliminating layer comprising a catalyst which is capable of catalizing substantial oxidation of a plurality of interferants but not substantial oxidation of the analyte,wherein the catalyst mediates the following reaction;
##STR4## where AH2 represents an interfering compound and A represents a non-interfering compound.
3 Assignments
0 Petitions
Accused Products
Abstract
Interferant eliminating analyte sensors and sensing process prevent erroneous assays. Glucose electrodes were coated with an oxidizing enzyme (peroxidase) which allows hydrogen peroxide to selectively oxidize ascorbate, urate, bilirubin, and acetaminophenol in the presence of glucose. Hydrogen peroxide may be added to the assayed solution or generated in situ. The oxidizing enzyme was prevented from causing undesired reduction currents at the glucose electrode by preventing contact of the oxidizing enzyme with the glucose electrode, or by increasing the applied voltage.
-
Citations
15 Claims
-
1. A biosensor comprising:
-
an electrode on which an analyte is electrooxidized at a given applied potential; and an interferant-eliminating layer substantially covering the electrode but electrically isolated therefrom at the given applied potential, said interferant-eliminating layer comprising a catalyst which is capable of catalizing substantial oxidation of a plurality of interferants but not substantial oxidation of the analyte, wherein the catalyst mediates the following reaction;
##STR4## where AH2 represents an interfering compound and A represents a non-interfering compound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A process for analyzing an analyte in the presence of interferants in a sample comprising the steps of:
-
contacting a sample with an interferant eliminating biosensor having an electrode and an interferant eliminating catalyst; substantially oxidizing interferants in said sample by an oxidation reaction catalyzed by the interferant eliminating catalyst; and detecting the analyte at the electrode in the absence of substantial interference. - View Dependent Claims (15)
-
Specification