Catalytic test composition intended to produce a range of colors
First Claim
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1. Process for determining the concentration of an analyte in a fluid sample, which process comprises:
- contacting a common substrate generating system capable of generating a common substrate by reaction with an analyte of interest, with (a) an analyte, (b) a first catalytic system capable of generating a change in hue of a first indicator component by reaction with the common substrate, and (c) a second catalytic system capable of generating a change in hue of a second indicator component by reaction with the common substrate,wherein the generation of the change in hues of the first and second indicator components occurs substantially simultaneously and provides different hues at different analyte concentrations, the final hue depending on the concentration of the analyte.
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Abstract
Test compositions and test devices are provided which are capable of generating different hues at different analyte concentrations. Visual results for clinically important analytes, such as glucose and cholesterol, are provided by use of compositions containing two independent catalytic systems which are reactive with a common substrate generated from the analyte of interest, to produce visual endpoints of different hues for different concentrations of analyte. Preferred formulations provide a RAINBOW of hues, the particular final hue produced depending on the concentration of the analyte.
39 Citations
19 Claims
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1. Process for determining the concentration of an analyte in a fluid sample, which process comprises:
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contacting a common substrate generating system capable of generating a common substrate by reaction with an analyte of interest, with (a) an analyte, (b) a first catalytic system capable of generating a change in hue of a first indicator component by reaction with the common substrate, and (c) a second catalytic system capable of generating a change in hue of a second indicator component by reaction with the common substrate, wherein the generation of the change in hues of the first and second indicator components occurs substantially simultaneously and provides different hues at different analyte concentrations, the final hue depending on the concentration of the analyte. - View Dependent Claims (2, 3)
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4. The test composition for the determination of the concentration of an analyte in a fluid sample, comprising:
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(a) a common substrate generating system which in the presence of an analyte in a fluid sample will generate a common substrate selected from the group consisting of adenosine triphosphate, reduced flavin adenine dinucleotide, hydrogen peroxide, glycerol and glucose; (b) a first catalytic system capable of generating a change in hue in a first indicator upon reaction with the common substrate; and (c) a second catalytic system capable of generating a change in hue in a second indicator by reaction with the common substrate, wherein the generation of the change in hues of the first and second indicators occurs substantially simultaneously and provides different hues at different analyte concentrations, the final hue produced by the test composition depending on the concentration of the analyte present in the fluid sample. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. The test device for the determination of concentration of an analyte in a fluid sample comprising:
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a carrier matrix, and a test composition incorporated into the carrier matrix, said test composition comprising; (a) a common substrate generating system which in the presence of an analyte in a fluid sample will generate a common substrate selected from the group consisting of adenosine triphosphate, reduced flavin adenine dinucleotide, hydrogen peroxide, glycerol and glucose; (b) a first catalytic system capable of generating a change in hue in a first indicator upon reaction with the common substrate; and (c) a second catalytic system capable of generating a change in hue in a second indicator by reaction with the common substrate, wherein the generation of the change in hues of the first and second indicators occurs substantially simultaneously and provides different hues at different analyte concentrations, the final hue produced by the test composition depending on the concentration of the analyte present in the fluid sample. - View Dependent Claims (16, 17, 18, 19)
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Specification