A REAGENT FORMULATION USING RUTHENIUM HEXAMINE AS A MEDIATOR FOR ELECTROCHEMICAL TEST STRIPS
First Claim
1. A formulation for coating a test strip, the formulation comprising:
- an enzyme;
a ruthenium hexamine mediator; and
a solution that dissolves the enzyme and the ruthenium hexamine mediator and in which the ruthenium hexamine comprises a concentration range from about 15% to about 20% of weight.
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Accused Products
Abstract
Described herein are various embodiments of a test strip, which may be capable of measuring an analyte. The test strip may include a working electrode and a reference electrode where the reagent formulation is disposed on the working electrode. The reagent formulation may be coated onto the test strip. The reagent formulation includes an enzyme, a ruthenium hexamine mediator, and a solution for dissolving the enzyme and the ruthenium hexamine mediator. The reagent formulation may be coated onto the test strip. The reagent formulation includes an enzyme, a ruthenium hexamine mediator, and a solution for dissolving the enzyme and the ruthenium hexamine mediator. The ruthenium hexamine has a concentration range from about 15% to about 20% (weight of mediator/volume) of solution. The enzyme may be either glucose oxidase and glucose dehydrogenase.
114 Citations
19 Claims
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1. A formulation for coating a test strip, the formulation comprising:
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an enzyme; a ruthenium hexamine mediator; and a solution that dissolves the enzyme and the ruthenium hexamine mediator and in which the ruthenium hexamine comprises a concentration range from about 15% to about 20% of weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A test strip comprising:
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a generally planar substrate that extends from a first end to a second end; first and second electrodes disposed on the substrate proximate one of the first and second ends; and a reagent layer having ruthenium hexamine trichloride in a buffer solution with a concentration range from about 15% to about 20% (weight/volume) such that the test strip shows essentially no increase in bias to reference when a blood sample is tested at about 400 millivolts after storage for seven days at 40 degrees Celsius at 75% relative humidity. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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11. A test strip comprising:
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a generally planar substrate that extends from a first end to a second end; first and second electrodes disposed on the substrate proximate one of the first and second ends; and a reagent layer having ruthenium hexamine Trichloride in a buffer solution with a concentration range from about 15% to about 20% (weight/volume) such that the test strip shows essentially no increase in bias to reference when tested at about 400 millivolts with blood glucose sample of about 70 mg/dL with uric acid concentration of about 0 mg/dL to about 20 mg/dL.
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12. A test strip comprising:
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a generally planar substrate that extends from a first end to a second end; first and second electrodes disposed on the substrate proximate one of the first and second ends; and a reagent layer having an enzyme and ruthenium hexamine Trichloride in a buffer solution with a concentration range from about 15% to about 20% (weight/volume) such that the test strip shows essentially no increase in bias to reference when tested at about 400 millivolts with blood glucose sample of about 70 mg/dL with gentisic acid concentration from about 0 mg/dL to about 50 mg/dL.
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Specification