Test device for detecting an analyte in a liquid sample

Details Test device for detecting an analyte in a liquid sample Test device for detecting an analyte in a liquid sample

1992-06-25

1994-01-04

Saunders, David

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 57, 422 58, 435 79, 435810, 435970, 436164, 436169, 436514, 436518, 436530, 436805, 436807, 436810, G01N 33543, G01N 33558

Patent

active

052757854

ABSTRACT:
A chromatographic test device for detecting the presence of an analyte in a liquid sample and incorporating at least two liquid-conductive zones (3, 4) which form separate liquid flow paths which deliver separate liquid streams to a region (8) in the test device during the test procedure, wherein control of the relative liquid flows in the separate flow paths is achieved, at least in part, by ensuring that at least one of the liquid flow paths is enhanced or made and/or broken or restricted during the course of the test procedure. Preferably such control is achieved by incorporating a liquid-swellable material (11) which is arranged to swell by contact with liquid sample and/or reagent and thereby to make or break contact between two liquid-conductive zones.

REFERENCES:
patent: 4960691 (1990-02-01), Gordon et al.
patent: 5135873 (1992-08-01), Patel et al.

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