Test kit for determining the presence of organic materials and method of utilizing same
First Claim
1. In a colorimetric indicator testing device for determining the presence of at least one specific substance in a liquid medium, the combination of:
- a housing, said housing including a top wall, a bottom wall and side edges, said top wall having at least one control port and at least one test port therein and said housing incorporating a filter chamber;
a flat, planar, elongated unitary filter located in said chamber, said filter having at least one control portion, at least one test portion, and a body portion for common wicking of liquid from said control and test portions;
said control and test portions juxtaposed, respectively, to said control and test ports and liquid impervious means located in the plane of the filter between said filter control and test portions.
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0 Petitions
Accused Products
Abstract
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 communication 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, subsequently, a liquid substrate is added to cause a color change in the filter below the test portion inversely proportional to the amount of antigen contained in the sample administered at the test port.
71 Citations
14 Claims
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1. In a colorimetric indicator testing device for determining the presence of at least one specific substance in a liquid medium, the combination of:
- a housing, said housing including a top wall, a bottom wall and side edges, said top wall having at least one control port and at least one test port therein and said housing incorporating a filter chamber;
a flat, planar, elongated unitary filter located in said chamber, said filter having at least one control portion, at least one test portion, and a body portion for common wicking of liquid from said control and test portions;
said control and test portions juxtaposed, respectively, to said control and test ports and liquid impervious means located in the plane of the filter between said filter control and test portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a housing, said housing including a top wall, a bottom wall and side edges, said top wall having at least one control port and at least one test port therein and said housing incorporating a filter chamber;
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9. In a colorimetric indicator testing device to determine the presence of at least one specific substance in a liquid medium, the combination of:
- a housing in the form of a card having at least one control port and at least one test port therein and incorporating a filter chamber in communication with said ports;
a flat unitary filter located in said filter chamber and having at least one control portion, at least one test portion, and a body portion for common wicking of liquids from said control and test portions;
said control and test portions underlying, respectively, said control and test ports and liquid impervious means located in the plane of the filter between said filter control and test portions; and
identical binding substrates in said control and test portions of said filter for each specific substance to be tested having antibody for said substance bound thereto. - View Dependent Claims (10, 11, 12, 13, 14)
- a housing in the form of a card having at least one control port and at least one test port therein and incorporating a filter chamber in communication with said ports;
Specification