Multilayer test strip device with a dissolvable reagent layer

US4876067A · kind A · utility

Assignee

• Boehringer Mannheim GmbH · DE

Inventors

• Ulfert Deneke · Fürth, DE
• Rolf Nagel · Bürstadt, DE
• Anselm Rothe · Birkenau, DE
• Helmut Freitag · Indianapolis, US

Key dates

• Filing date: Aug 25, 1987
• Grant date: Oct 24, 1989
• Expiry date: Aug 25, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S435/805
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention provides a multi-layer test carrier (1) for the analytical determination of a component in a liquid sample, especially in a body fluid, having a first carrier layer (2) and a second carrier layer (10), at least one of which is transparent, a liquid-absorbing layer (3) being applied to the first carrier layer (2) and a reagent layer (11) containing at least one reagent being applied to the second carrier layer (10), the carrier layers being so arranged and fixed that the surfaces (3a, 11a) of the absorbing layer and of the reagent layer facing away from the carrier layer can be brought into contact with one another and can be pressed against one another, wherein the reagent layer (11) is soluble substantially without residue in the sample liquid and the take-up ability of the liquid-absorbing layer (3) for the sample liquid is so great that an amount of liquid absorbed therein suffices in order to dissolve the reagent layer free of residues so that substances contained in the reagent layer (11) pass over from the reagent layer (11) into the liquid-absorbing layer (3) when the two layers are pressed against one another.