| 摘要 |
The present invention resides in one aspect in an assay device for an analyt e comprising a flow path (22, 23, 24) for a liquid defined by interstices in a porous medium (20), at least one liquid flow barrier (26) which is impregnat ed into and immobilised on the porous medium (20) at a location in the flow pat h (22, 23, 24), at least one barrier release means (27) which is impregnated into the porous medium (20), and an analyte capture region (28a) in the flow path (22, 23, 24). The barrier release means (27) is soluble in the liquid, and, in use, is moveable by liquid flowing in the flow path (22, 23, 24) int o contact with the flow barrier (26) so as to permit liquid flow through said location. Preferably, an analyte visualising agent is provided at a zone (29 ) in the flow path (22, 23, 24), said visualising agent being capable of interacting with the analyte to indicate the presence of the analyte.</SDOAB >
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