Patent ID: 6376204
Filing Date: 2002-04-23
Classification: G01N,Y10S

Abstract:
A biological assay material for detecting the presence of a toxic substance comprising:a flexible base for immobilization of a ligand applied to a surface thereof, said base selected from the group consisting of polyolefin and polyvinylchloride; a permeable layer adjacent said flexible base and having a capture antibody thereon, said antibody being a biologically active ligand characterized by its ability to recognize an epitope of a toxic substance; and a protective layer adjacent said permeable layer and including a biologically active detector antibody which acts as a means to selectively control the migration of antibodies and antigens, said detector antibody characterized by its ability to recognize an epitope of a toxic substance forming an antibody/antigen complex; whereby passage of a toxic substance is permitted and passage of said antibody/antigen complex is prevented.