Boehringer Mannheim Gmbh

Hans-Erich Wilk

Helmut Freitag

Rolf Lerch

Anselm Rothe

Erich Schneider

Karin Munter

Andreas Marschall

Dieter Mangold

Heino Eikmeier

Peter Vogel

Joachim Steinbiss

Johann Berger

Ada Goerlach-Graw

Klaus Pollmann

Manfred Bleisteiner

Ulrich Naegele

Reiner Graw

Josef Burg

Henio Eikmeier

Johannes Winkle

The invention addresses an analysis element for the determination of an analyte according to the principle of a heterogeneous immunoassay. Said analysis element is made of a chromatographic porous carrier material and has a reaction zone, at least two detection zones and absorptive zones following said detection zones. The reaction zone contains analyte-specific and labelled binding partners which are present in a number of soluble compartments which are close together, but nevertheless spatially separated. The detection zones are adjacent to the reaction zones and contain an immobilized binding reagent for one of the binding partners present in the reaction zone. At least one detection zone contains a binding reagent for the analyte-specific unlabelled binding partner.

Analysis element and method for determination of an analyte in a liquid

A carrier matrix of polyvinyl alcohol-coated glass is dissolvably impregnated with reagent. The matrix is manufactured by slurrying glass fibers in an excess of water and polyvinyl alcohol and forming a layer, which is then dried and impregnated with reagent.

Carrier matrix with dissolvably impregnated reagent

The present invention provides a process for the determination of an enzyme from an isoenzyme mixture in a liquid sample by inhibition of the disturbing isoenzymes and determination of the non-inhibited enzyme, wherein the isoenzyme mixture is contacted with one or more substances which are able to inhibit the disturbing isoenzymes, the sample containing the inhibiting substance(s) is transferred to a small-pored reaction medium and the disturbing enzyme is there inhibited and the determination of the non-inhibited enzyme is carried out in the resulting liquid. The present invention also provides a test carrier for carrying out this process.

Process and test carrier for the determination of an enzyme from an

The invention concerns a device and its use for separating plasma from whole blood by means of a fibre-containing layer which contains an erythrocyte-aggregating substance and is characterized in that the fibre-containing layer contains glass fibres which are coated with polyvinyl alcohol or with polyvinyl alcohol/polyvinyl acetate. The invention also concerns a test carrier for the determination of a blood component as well as a process for separation from whole blood in which the device according to the present invention is used.

Device and its use for the separation of plasma from whole blood

Test carrier for the analytical determination of a constituent of a sample fluid by a specific binding reaction between two binding partners having biological affinity. A plurality of test layers is so disposed that they are wetted successively by the fluid and form a fluid transport path, in which one of the test layers is a fixing layer (18) which is a porous carrier matrix. The first of the two binding partners is fixed to the latter. The fluid containing the second binding partner flows through the fixing layer (18), at right angles to its surface, on the test carrier (10). A largely complete binding reaction in an extraordinarily short time is achieved during the flow through the preferably very thin fixing layer (18) by the fact that a microporous plastics layer with a pore size P of at least 0.01 pm is used as the carrier matrix, and at the same time the size D of the second binding partner and the pore size P of the plastics layer are adjusted to one another so that the pore size P is at least twice and at most ten times as great as the size D of the second binding partner.

Test carrier for analytical determination having a highly effective

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 analysis of a sample liquid and especially of a body fluid, having a porous test layer (8, 13) which contains a solid component (9, 17), wherein the solid component (9, 17) is coated with a protein which is insoluble in the sample liquid under the test conditions. A process for the production of this test layer is also disclosed, wherein the protein is dissolved in a solvent under conditions under which the solubility of the protein is sufficiently high in order to dissolve a certain minimum amount of the protein, the solid component of the test layer is contracted with the solution and the solubility is reduced to such an extent that the component is coated by the precipitating protein.

Test carrier for the analysis of a sample liquid

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

The present invention provides a process for the determination of an analyte in a body fluid, in which there are used two binding components capable of specifically binding with one another, one of the binding components being enzyme-labelled and not carrier-fixed and the other binding component being carrier-fixed. The process contains a step in which the binding components are incubated with one another so that binding reaction takes place. The amount of enzyme-labelled binding component not bound to the carrier-fixed binding component is a measure of the concentration of the analyte which is determined by allowing the labelling enzyme to act upon a substrate producing a detection signal. During the specific binding reaction, incubation is carried out simultaneously with a non-fixed substrate of the labelling enzyume which does not produce a detection signal and with a carrier-fixed substrate of the labelling enzyme which produces a detection signal, the substrate not producing a detection signal being so chosen with regard to the amount used and affinity to the labelling enzyme in relation to the amount of the substrate producing a detection signal and its affinity to the labelling enzyme and in relation to the total activity of the labelling enzyme that the enzyme-catalyzed reaction of the substrate producing a detection signal is delayed until the specific binding reaction between the binding components has substantially taken place.

Process and test carrier for the determination of an analyte

The present invention provides a process for the detection of an analyte, wherein a sample containing the analyte is incubated either with a labelled binding partner and the immobilized analyte or an immobilized analyte analogue or with the labelled analyte or analyte analogue and an immobilized binding partner, the binding partner displaying towards the immobilized or labelled analyte or analyte analogue a higher affinity than towards the free analyte, and the labelled binding partner or the labelled analyte or the labelled analyte analogue is present in insufficiency compared with the concentration of the analyte to be detected. The present invention also provides an agent for carrying out this process, wherein it contains either the immobilized analyte or an immobilized analyte analogue and a labelled binding partner or the labelled analyte or a labelled analyte analogue and an immobilized binding partner, as well as optionally an appropriate buffer system and further conventionally used adjuvants, the binding partner displaying towards the immobilized or labelled analyte or analyte analogue a higher affinity than towards the free analyte.

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Lorsch, Germany

Hans-Erich Wilk