G - Physics – 01 – N
Patent
G - Physics
01
N
150/26, 167/43
G01N 33/52 (2006.01) G01N 33/535 (2006.01)
Patent
CA 1258626
Abstract of the Disclosure: A test card incorporates a colorimetric indicator test to determine the presence of a minute amount of a specific substance in a liquid medium. The test card includes top and bottom sheets adhesively secured to an intermediate frame member which, together with the top and bottom sheets, defines a filter chamber having a flat filter therein which incorporates a test portion. The test portion of the filter has a binding substrate to which antibodies of the specific substance have been bound. This binding substrate is in communi- cation with a test port. In the method of the invention a substance to be tested is administered through the test port and contains an unknown amount of antigen. After the sample is administered an aqueous solution of enzyme labelled antigen is administered and, subse- quently, a liquid substrate is added to cause a color change in the filter below the test port inversely proportional to the amount of antigen contained in the sample administered at the test port.
499307
Chung Roy A.
Kelton Arden A.;
Wie Siong I.
Environmental Diagnostics Inc.
Fetherstonhaugh & Co.
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