G - Physics – 01 – N
Patent
G - Physics
01
N
167/44
G01N 33/558 (2006.01)
Patent
CA 1303492
25660-FF ABSTRACT OF THE DISCLOSURE A method and device for determining the presence of an analyte in a sample suspected of containing the analyte is disclosed. The method involves contacting a test solution containing the sample, an antibody for the analyte, and a conjugate of the analyte and a label with a contact portion of a piece of bibulous material capable of being traversed in at least one direction by the test solution through capillary action. The bibulous material contains a first receptor capable of binding to said conjugate. The first receptor is non-diffusively bound to a situs on the bibulous material separate from the contact portion. The bibulous material further contains a second receptor capable of binding the antibody to the analyte between the situs and the contact portion. The second receptor is non-diffusively bound to the bibulous material. At least a portion of the test solution is allowed to traverse the bibulous material by capillary action and thereby contact the situs. The situs is examined for the presence of the conjugate. To this end, the situs can be exposed to a signal producing means capable of interacting with the label to produce a signal in relation to the amount of analyte in the test solution. The signal produced at the situs is then detected.
546080
Abbott Laboratories
Johnson Douglas S. Q.c.
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