Test device and a method for the detection of a component of a liquid sample
AssigneeBayer Aktiengesellschaft
InventorsKarlheinz Hildenbrand, Hans-Hagen von Dohren, Hermann Perrey, Georg Frank, Rolf Dhein
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Abstract
In a test strip for the detection of a component in a liquid sample, the strip comprising a support layer, a microporous polymer layer and a reagent for the detection of the component to be determined, the improvement wherein the microporous polymer layer is a membrane which has an asymmetric pore structure with the narrower pores being on the side to which the sample is applied, and the support layer is macroscopically smooth. The porous membrane is produced by coagulation from solution.
Claims17
A test device for the detection of a component in a liquid sample, the device comprising a support layer, a microporous polymer layer, one side of which facing the support, the other side of which being a side on which a sample can be applied and a reagent system for the detection of the component to be determined, the reagent system being incorporated in the polymer layer, the microporous polymer layer being a membrane which has an asymmetric pore structure with the pores narrowing toward the side to which the sample is applied, the microporous polymer layer being synthesized from a polymer selected from the group consisting of polyamides, polyether carbonates, polyacrylonitriles and polyurethanes and being produced by coagulation of a solution of the polymer, and the support layer being macroscopically smooth and impermeable to the sample.
Dependencies are inferred from the claim text.