Solid phase assay employing capillary flow
First Claim
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1. An assay for determining analyte in a sample, comprising:
- employing a absorbent solid support having first, second and third portions, said first portion receiving a sample to be assayed, said second portion receiving a tracer, said third portion including a binder for the analyte, said third portion being in capillary flow communication with both the first and second portions;
moving tracer and sample by capillary flow across the binder in the third portion to provide contact between sample and binder prior to substantial contact of the tracer with either the binder or sample; and
determining at least one of tracer bound in said third portion or tracer which passes across said third portion to thereby determine analyte.
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Abstract
Test device and assay for determining analyte wherein tracer and sample may be simultaneously applied to different absorbent material portions both in capillary flow communication with an absorbent material portion having a binder supported thereon in a manner whereby sample contacts binder, prior to any substantial contact between sample and tracer or tracer and binder.
315 Citations
24 Claims
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1. An assay for determining analyte in a sample, comprising:
employing a absorbent solid support having first, second and third portions, said first portion receiving a sample to be assayed, said second portion receiving a tracer, said third portion including a binder for the analyte, said third portion being in capillary flow communication with both the first and second portions;
moving tracer and sample by capillary flow across the binder in the third portion to provide contact between sample and binder prior to substantial contact of the tracer with either the binder or sample; and
determining at least one of tracer bound in said third portion or tracer which passes across said third portion to thereby determine analyte.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An article of manufacture for determining analyte, comprising:
a solid support having first, second and third portions, said first portion for receiving a sample to be assayed, said second portion for receiving a tracer, said third portion including a binder for the analyte, said third portion being in capillary flow communication with both the first and second portions whereby sample and tracer flow across the binder in the third portion to provide contact between sample and binder prior to substantial contact of the tracer with either the binder or sample, said solid support being an absorbent material which provides for capillary flow. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
Specification