Test element with a one layer reaction film
First Claim
Patent Images
1. A test element for the optical detection of an analyte comprising:
- a support having at least one transparent portion, anda one-layer film positioned on the support, the film comprising a reagent for the reflection photometric detection of the analyte and pigment particles, the film having a thickness when dry about 10 μ
m or less, wherein the test element comprises only one functional layer, and wherein the film comprises a mixture of fine-grained pigment particles having an average diameter of less than 0.5 μ
m with medium and/or coarse-grained particles, the average diameter of medium grain particles being between about 0.7 μ
m and about 4 μ
m and the average diameter of coarse-grained particles being between about 4 μ
m and about 8 μ
m.
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Abstract
The invention concerns test elements and methods for the optical detection of an analyte in a sample. The test element includes a support having at least one transparent portion, and a one-layer film positioned on the support. The film has a thickness when dry of less than about 10 μm. The method includes contacting the sample with the test element and determining the analyte concentration in the sample.
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Citations
31 Claims
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1. A test element for the optical detection of an analyte comprising:
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a support having at least one transparent portion, and a one-layer film positioned on the support, the film comprising a reagent for the reflection photometric detection of the analyte and pigment particles, the film having a thickness when dry about 10 μ
m or less, wherein the test element comprises only one functional layer, and wherein the film comprises a mixture of fine-grained pigment particles having an average diameter of less than 0.5 μ
m with medium and/or coarse-grained particles, the average diameter of medium grain particles being between about 0.7 μ
m and about 4 μ
m and the average diameter of coarse-grained particles being between about 4 μ
m and about 8 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A test element for the optical detection of an analyte comprising:
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a support having at least one transparent portion, and a one-layer film positioned on the support, the film comprising a reagent for the reflection photometric detection of the analyte and pigment particles, wherein the test element is formed to determine the analyte within a reaction period of less than about 5 seconds, and wherein the test element comprises only one functional layer, and wherein the film comprises a mixture of fine-grained pigment particles having an average diameter of less than 0.5 μ
m with medium and/or coarse-grained particles, the average diameter of medium grain particles being between about 0.7 μ
m and about 4 μ
m and the average diameter of coarse-grained particles being between about 4 μ
m and about 8 μ
m.
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24. A test element for the optical detection of an analyte comprising:
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an at least partially optically essentially transparent support and a one-layer reaction film positioned on the support and comprising a test reagent for the reflection photometric determination of the analyte and pigment particles, wherein the thickness and porosity of the reaction film and the concentration of the test reagent are adjusted such that the analyte is determined within a reaction period of less than about 5 seconds with a signal intensity that is sufficient for a quantitative determination, and wherein the test element comprises only one functional layer, and wherein the film comprises a mixture of fine-grained pigment particles having an average diameter of less than 0.5 μ
m with medium and/or coarse-grained particles, the average diameter of medium grain particles being between about 0.7 μ
m and about 4 μ
m and the average diameter of coarse-grained particles being between about 4 μ
m and about 8 μ
m. - View Dependent Claims (25, 26, 27)
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28. A method for the detection of an analyte in a sample comprising the steps:
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contacting the sample with a test element comprising a support having at least one transparent portion, and a one-layer film positioned on the support, the film comprising a reagent for the reflection photometric detection of the analyte and pigment particles, the film having a thickness when dry about 10 μ
m or less and wherein the test element comprises only one functional layer, and wherein the film comprises a mixture of fine-grained pigment particles having an average diameter of less than 0.5 μ
m with medium and/or coarse-grained particles, the average diameter of medium grain particles being between about 0.7 μ
m and about 4 μ
m and the average diameter of coarse-grained particles being between about 4 μ
m and about 8 μ
m; anddetermining the analyte concentration in the sample using reflection photometry of the test element. - View Dependent Claims (29, 30, 31)
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Specification