Analytical element and method for analysis of multiple analytes
First Claim
1. An analytical element for the analysis of analytes in a liquid, said element having an essentially dry matrix permeable to said liquid, at least a portion of said matrix comprising(a) a first interactive composition for the generation of a first radiometrically detectable species in an amount corresponding to the presence and/or concentration of one analyte, or a reaction or decomposition product thereof, and(b) a second interactive composition for the inhibition or the destruction of a second radiometrically detectable species in an amount corresponding to the presence and/or the concentration of a second analyte, or a reaction or decomposition product thereof;
- said first and second interactive compositions being in liquid contact with one another within said matrix during use, and each of said first and second radiometrically detectable species having a different characteristic, detectable absorption or emission peak.
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Accused Products
Abstract
An analytical element for the detection of two or more analytes in an aqueous liquid. The element contains an essentially dry matrix, at least a portion of the matrix containing at least two interactive compositions, a first composition generating a first radiometrically detectable species corresponding to the presence and/or concentration of one analyte, and a second composition for the inhibition or the destruction of a second radiometrically detectable species corresponding to the presence and/or concentration of one of the other analytes. The first and second interactive compositions are positioned in the element matrix to be in liquid contact with one another. Each of the first and second detectable species produced in the element is selected to have a different, characteristic, detectable absorption or emission peak in the electromagnetic spectrum.
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Citations
17 Claims
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1. An analytical element for the analysis of analytes in a liquid, said element having an essentially dry matrix permeable to said liquid, at least a portion of said matrix comprising
(a) a first interactive composition for the generation of a first radiometrically detectable species in an amount corresponding to the presence and/or concentration of one analyte, or a reaction or decomposition product thereof, and (b) a second interactive composition for the inhibition or the destruction of a second radiometrically detectable species in an amount corresponding to the presence and/or the concentration of a second analyte, or a reaction or decomposition product thereof; said first and second interactive compositions being in liquid contact with one another within said matrix during use, and each of said first and second radiometrically detectable species having a different characteristic, detectable absorption or emission peak. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A multi-zone analytical element for the analysis of analytes, in liquid, said element comprising a support bearing a spreading zone and a reagent zone, said zones providing an essentially dry matrix permeable to said liquid, at least a portion of said matrix comprising
(a) a first interactive composition for the generation of a first radiometrically detectable species in an amount corresponding to the presence and/or concentration of one analyte, or a reaction or decomposition product thereof, and (b) a second interactive composition for the inhibition or the destruction of a second radiometrically detectable species in an amount corresponding to the presence and/or the concentration of a second analyte, or a reaction or decomposition product thereof; said first and second interactive compositions being in liquid contact with one another within said matrix during use, with at least a portion of said interactive compositions contained in said reagent zone, and each of said first and second radiometrically detectable species having a characteristic, detectable absorption or emission peak in a region of the electromagnetic spectrum above 300 nm, the respective peaks being separated by at least about 5 nm.
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10. A multilayer analytical element for the analysis of analytes, in liquid, said element comprising a support bearing, in sequential order from said support, superposed registration layer, reagent layer, and spreading layer, said superposed layers providing an essentially dry matrix permeable to said liquid, at least a portion of said matrix comprising
(a) a first interactive composition for the generation of a first radiometrically detectable species in an amount corresponding to the presence and/or concentration of one analyte, or a reaction or decomposition product thereof, and (b) a second interactive composition for the inhibition or the destruction of a second radiometrically detectable species in an amount corresponding to the presence and/or the concentration of a second analyte, or a reaction or decomposition product thereof; said first and second interactive compositions being in liquid contact with one another within said matrix during use, with at least a portion of one of said interactive compositions contained in said reagent layer, and each of said first and second radiometrically detectable species having a characteristic, detectable absorption or emission peak in a region of the electromagnetic spectrum above 300 nm, the respective peaks being separated by at least about 5 nm. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for the analysis of analytes in a liquid, said method comprising
(a) contacting together said liquid an an analytical element having an essentially dry matrix permeable to said liquid, at least a portion of said matrix comprising (i) a first interactive composition for the generation of a first radiometrically detectable species in an amount corresponding to the presence and/or concentration of one analyte, or a reaction or decomposition product thereof, and (ii) a second interactive composition for the inhibition or the destruction of a second radiometrically detectable species in an amount corresponding to the presence and/or the concentration of a second analyte, or a reaction or decomposition product thereof; -
said first and second interactive compositions being in liquid contact with one another within said matrix during use, with at least a portion of one of said interactive compositions contained in said reagent layer, and each of said first and second radiometrically detectable species having a characteristic, detectable absorption or emission peak; and (b) radimetrically detecting, after a predetermined time, a separate detectable change occurring in said element in response to the presence and/or concentration of each of said analytes, at least one detectable change being the result of said inhibition or destruction of said second radiometrically detectable species.
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Specification