Electrode system for measuring an analyte concentration under in-vivo conditions
First Claim
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1. Electrode system for measuring a concentration of an analyte under in-vivo conditions, the system comprising:
- a substrate;
a counter-electrode having an electrical conductor arranged on the substrate;
a working electrode having an electrical conductor arranged on the substrate on which an enzyme layer containing immobilized enzyme molecules for catalytic conversion of the analyte is arranged, wherein the enzyme layer is in the form of multiple fields arranged in a row or in a series at a pre-determined distance from one another on the electrical conductor of the working electrode so that the multiple fields are separate from each other; and
a diffusion barrier that slows diffusion of the analyte from body fluid surrounding the electrode system to the enzyme molecules.
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Abstract
An electrode system for measuring the concentration of an analyte under in-vivo conditions comprises a counter-electrode having an electrical conductor, a working electrode having an electrical conductor on which an enzyme layer containing immobilized enzyme molecules for catalytic conversion of the analyte is arranged, and a diffusion barrier that slows the diffusion of the analyte from body fluid surrounding the electrode system to enzyme molecules. The enzyme layer is in the form of multiple fields that are arranged on the conductor of the working electrode at a distance from each other.
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Citations
27 Claims
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1. Electrode system for measuring a concentration of an analyte under in-vivo conditions, the system comprising:
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a substrate; a counter-electrode having an electrical conductor arranged on the substrate; a working electrode having an electrical conductor arranged on the substrate on which an enzyme layer containing immobilized enzyme molecules for catalytic conversion of the analyte is arranged, wherein the enzyme layer is in the form of multiple fields arranged in a row or in a series at a pre-determined distance from one another on the electrical conductor of the working electrode so that the multiple fields are separate from each other; and a diffusion barrier that slows diffusion of the analyte from body fluid surrounding the electrode system to the enzyme molecules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 21)
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15. Sensor comprising:
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an electrode system comprising; a counter-electrode having an electrical conductor; a working electrode having an electrical conductor on which an enzyme layer containing immobilized enzyme molecules for catalytic conversion of the analyte is arranged, wherein the enzyme layer is in the form of multiple fields that are arranged in a row or in a series at a pre-determined distance from each other on the electrical conductor of the working electrode so that the multiple fields are separate from each other, and wherein at least two non-neighboring fields of the enzyme layer are at least 3 mm distant from each other; and a diffusion barrier that slows diffusion of the analyte from body fluid surrounding the electrode system to the enzyme molecules; a potentiostat connected to the electrode system; and an amplifier for amplification of measuring signals of the electrode system. - View Dependent Claims (16, 17, 20, 22, 23)
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24. Electrode system for measuring a concentration of an analyte under in-vivo conditions, the system comprising:
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a substrate; a counter-electrode having an electrical conductor arranged on the substrate; a working electrode having an electrical conductor arranged on the substrate; an enzyme layer containing immobilized enzyme molecules for catalytic conversion of the analyte, wherein the enzyme layer is in the form of multiple fields that are arranged in a row or in a series at a pre-determined distance from each other on the electrical conductor of the working electrode so that the multiple fields are separate from each other, and wherein the enzyme interacts with a catalytic redox mediator that is contained in the enzyme layer and reduces or prevents an oxygen dependence of the catalytic conversion of the analyte, and a diffusion barrier that slows diffusion of the analyte from body fluid surrounding the electrode system to the enzyme molecules. - View Dependent Claims (25, 26, 27)
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Specification