Patent ID: 8664001

Claim:
An immunochemical filter detection system comprising a test cassette, a cylindrical cap having a body, a closed end and an open end consisting of a filter material consisting essentially of a labeled binding reagent for analyte bound thereto in dry form, and a cylindrical sample collection vessel for receiving the filter material having an open end that is liquid tightly attachable to the open end of the cap and an opposing closed end, wherein the filter material protrudes outwardly from the open end of the cap and, is in a path for flow of sample thereinto when the cap is liquid tightly attached to the sample collection vessel, and has a particle retention of 10 to 20 micrometers, wherein the binding reagent is selected from the group consisting of an antibody, a recombinant antibody, an antigen, a lectin, a receptor, a ligand, fragments thereof and combinations thereof, and wherein further said labeled binding reagent and any analyte bound thereto are retained within said filter material until the cap is removed from the sample collection vessel, applied to an aperture in the test cassette and exposed to a binding reagent-free liquid analyte sample solution for migration through the filter material.