HYBRID PHASE LATERAL FLOW ASSAY
First Claim
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1. An analytical device for the single-step determination of the presence of an analyte in a liquid sample comprising a test strip comprising:
- a) a first piece of non-porous solid surface comprising, in a reversible immobilization zone, a reversibly immobilized labeled reagent that binds said analyte to form a complex;
b) a porous carrier comprising, in a detection zone, an immobilized reagent that binds said complex, wherein said porous carrier is in contact with said non-porous solid surface; and
c) a second piece of non-porous solid surface placed over (a) and (b).
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Abstract
The invention relates to devices for performing single step assays for the determination of the presence or absence of an analyte in a liquid sample, and methods of determining the presence or absence of such analytes using such devices. Devices disclosed comprise a labeled analyte-binding reagent reversibly-immobilized on a non-porous solid material, which solid material is in physical contact with a dry porous carrier bearing an immobilized analyte-binding reagent. Also provided are quantitative assay devices.
108 Citations
10 Claims
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1. An analytical device for the single-step determination of the presence of an analyte in a liquid sample comprising a test strip comprising:
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a) a first piece of non-porous solid surface comprising, in a reversible immobilization zone, a reversibly immobilized labeled reagent that binds said analyte to form a complex; b) a porous carrier comprising, in a detection zone, an immobilized reagent that binds said complex, wherein said porous carrier is in contact with said non-porous solid surface; and c) a second piece of non-porous solid surface placed over (a) and (b). - View Dependent Claims (2, 3)
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4. A device for the single step quantitative measurement of an analyte in a liquid sample, the device comprising:
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a) a piece of non-porous solid surface comprising, in an immobilization zone, a reversibly immobilized labeled reagent that binds said analyte to form a complex; and b) a porous carrier comprising a binding reagent and being in contact with said non-porous solid surface, wherein said binding reagent is applied to and immobilized in a detection zone having a longitudinal axis parallel to a flow of a liquid sample, wherein when said liquid sample comprises the analyte, the binding results in a signal, and wherein the distance from the point at which said liquid sample entered said detection zone to the furthest point in said detection zone at which said signal is detected above background is indicative of the amount of analyte present in said sample. - View Dependent Claims (5, 6, 7, 8)
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9. An analytical device for the single-step determination of the presence or absence of an analyte in a liquid sample comprising a test strip comprising:
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a non-porous solid surface comprising, in a reversible immobilization zone, a reversibly immobilized labeled reagent, that competes with said analyte for binding sites present in the detection zone, and a porous carrier comprising, in a detection zone, an immobilized reagent that binds said labeled reagent and analyte in a liquid sample, wherein the absence of analyte generates a detectable signal, wherein said porous carrier is in contact with said non-porous surface. - View Dependent Claims (10)
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Specification