Abstract: Test carrier for analysis of a sample liquid with the help of a specific binding reaction of two bioaffine binding partners, one of which is contained in the sample and one in the reagent system of the test carrier, with several capillary-active test zones (11-16; 21-25) arranged substantially next to one another on a base layer (2). The test zones are in liquid contact with one another so that they form a liquid transport path (20, 30) along which a liquid flows, driven by capillary forces, from a start zone (11, 21), a reaction thereby taking place between the first binding partner and the reagent system containing the second reaction partner, which reaction leads to a labelled species characteristic for the desired analysis.

Abstract: A carrier fleece is prepared for use as reagent carrier from which reagents can be dissolved in as assay such as immunological analysis. The carrier fleece contains from 5 to 60% by weight of cellulose-containing fibers, from 40 to 95% by weight of polyester or polyamide polymer fibers or a combination thereof and from 5 to 30% by weight of the fibers of an organic binding agent which has a hydroxyl or an ester group or a combination thereof. In an immunological analysis, the carrier fleece is impregnated with an immunologically active agent such as a beta-galactosidase conjugate and then introduced into a solution of a sample containing an immunologically active substance to be analyzed. The immunologically active agent is eluted into the sample solution and the presence of the immunologically active substance in the sample is determined.

Abstract: The ionic strength or the specific gravity of an aqueous liquid is determined by mixing the liquid with a reagent composition which contains at least one pH buffer substance but no polyelectrolyte polymer, or at least one pH buffer substance and/or at least one complex former, determining the pH of the mixture, and evaluating the determined value.

Abstract: The ionic strength or the specific gravity of an aqueous liquid is determined by mixing the liquid with a reagent composition which contains at least one pH buffer substance but no polyelectrolyte polymer, or at least one pH buffer substance and/or at least one complex former, determining the pH of the mixture, and evaluating the determined value.

Abstract: Carrier-bound multicomponent detection system for the colorimetric determination of esterolytically- and/or proteolytically-active ingredients of body fluids, wherein the components of the detection system are present in different reagent layers, and where a liquid exchange between the layers is possible.