Electrodes and their use in assays
First Claim
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1. An electrode comprising a non-conductive substrate and a conductive layer positioned on the non-conductive substrate, the conductive layer comprising, in a bonded matrix, graphite particles coated with a noble metal, and uncoated carbon particles, wherein the graphite particles are up to 20 μ
- m in size and have a surface area of 1-50 m2/g and the carbon particles have an average size of less than 1 μ
m.
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Abstract
An electrode comprises a non-conductive substrate and a conductive layer comprising, in a bonded matrix, graphite particles coated with a noble metal, and carbon particles, wherein the graphite particles are up to 20 μm is size and have a surface area of 1-50 m2/g. This electrode is capable of measuring low levels of analyte, e.g. glucose in sweat when convined with a layer containing glucose oxidase.
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Citations
20 Claims
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1. An electrode comprising a non-conductive substrate and a conductive layer positioned on the non-conductive substrate, the conductive layer comprising, in a bonded matrix, graphite particles coated with a noble metal, and uncoated carbon particles, wherein the graphite particles are up to 20 μ
- m in size and have a surface area of 1-50 m2/g and the carbon particles have an average size of less than 1 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 19, 20)
- m in size and have a surface area of 1-50 m2/g and the carbon particles have an average size of less than 1 μ
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13. An electrode according to claimn 12, which additionally comprises a further layer, on the conductive layer, including an enzyme.
- 17. An electrode according to clain 16, which additionally comprises a separate conducting layer, capable of being heated.
Specification