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Analytical element

  • US 4,427,632 A
  • Filed: 04/22/1982
  • Issued: 01/24/1984
  • Est. Priority Date: 04/29/1981
  • Status: Expired due to Term
First Claim
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1. An analytical element for determining the presence of a component in a liquid sample comprising:

  • (a) a light-transmissive and liquid-impermeable support;

    (b) at least one reagent layer containing at least one reagent reactive with said component and containing a hydrophilic colloid; and

    (c) at least one hydrophobic developing layer having a fibrous structure and being positioned on the side of said reagent layer opposite to said support whereby the component in said liquid sample permeates through said developing layer toward said reagent layer, said developing layer formed by coating said reagent layer with a homogeneous dispersion comprising a hydrophobic organic macromolecular polymer having reactive groups and a fibrous material.

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