Manufacture of test strips

摘要

A process of manufacturing test strips of the type comprising a length of porous carrier material capable of acting as a liquid flow path for a sample liquid and having at least zone downstream from a first end of the strip which zone contains an immobilised specific binding agent to act as a capture means during an assay to reveal the presence of an analyte in applied sample liquid, and in which process the specific binding agent is deposited onto a sheet of the porous carrier material which is then blocked and subdivided into a plurality of individual identical test strips, wherein blocking of the porous carrier material is achieved by applying a solution of blocking agent to the sheet upstream from the zone in an amount sufficient to ensure that the solution permeates downstream to beyond the zone. Preferably there is a plurality of zones of immobilised agent arranged in series on the strip, and wherein blocking is achieved by applying a solution of blocking agent to the sheet upstream from the first of the plurality of zones in an amount sufficient to ensure that the solution permeats downstream to beyond the last of the plurality of zones.