Boehringer Mannheim Gmbh

Karin Munter

Hans-Erich Wilk

Rolf Lerch

Helmut Freitag

Klaus Pollmann

Henio Eikmeier

Johannes Winkle

The present invention provides a test carrier for the analysis of a sample liquid with a test layer which contains a ligand fixed to to carrier particles, which ligand reacts with a component of the sample liquid, the test layer having a three-dimensional open structure which is so porous that the sample liquid with the component can penetrate into it, the carrier particles being arranged in the layer in such a manner that the ligand, upon pentration of the sample liquid, comes into contact with the component of the sample, wherein the carrier particles consist of an inorganic material, on the surface of which reactive organic groups are covalently bound as coupling groups, and the ligand is covalently bound to the coupling groups. The present invention also provides processes for the production of such a test carrier and a method for using it.

Test carrier for analysis of a liquid sample

The present invention provides a test carrier for the analytical determination of a component of a sample liquid with the help of immunological reagents having a conjugate layer (2, 12), which contains a soluble conjugate of a first immunological binding partner with a labelling, a porous fixing layer (3, 13), which contains a second binding partner in carrier-fixed form binding specifically with the first binding partner, and an optical detection layer (8, 18), wherein the fixing layer (3, 13) is constructed in such a manner that the suction speed with which the liquid is transported in it is so high that the time needed for the spreading out of the liquid in the fixing layer is considerably shorter than the incubation time which is needed for the completion of the specific binding reaction between the first binding partner and the second binding partner and the optical detection layer (8, 18) is so fixed on the test carrier (1, 11) that, in a first position, it is not in contact with the fixing layer (3, 13) making possible a liquid exchange but can be brought into a second position in which a liquid exchange between the fixing layer (3, 13) and the optical detection layer (8, 18) can take place. The present invention also provides a process for the immunological analytical determination of a component of a sample liquid, as well as a process for the production of a fixing layer for a test carrier.

Test carrier for analysis of a sample liquid, method of using a test

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Mannheim, Germany

Karin Munter