Solid phase chromatographic immunoassay

  • US 5,591,645 A
  • Filed: 04/20/1993
  • Issued: 01/07/1997
  • Est. Priority Date: 03/27/1987
  • Status: Expired due to Term
First Claim
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1. A test strip for determining the presence of an analyte in a liquid sample comprising a solid support, said solid support comprising at least a first portion and a second portion, said portions being in the same plane so as to permit capillary flow communication with each other;

  • said first portion being the site for application of the liquid sample and further comprising a tracer site, said tracer site consisting of a tracer movably supported therein wherein said tracer comprises a ligand, which specifically binds to the analyte, conjugated to a visible particulate marker; and

    said second portion being the site for visually determining the presence of the visible particulate marker, said second portion consisting of a binder immobilized therein which specifically binds to the analyte.

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