Abstract: A test strip for the immunochemical detection of substances after sampling from surfaces, with a conjugate zone (2) located between an eluent application zone (1) at one end of the test strip and a reaction zone (3) at the opposite end, the zones being in liquid connection with one another. A section of the test strip in the area including the eluent application zone and the reaction zone is used to wipe off the surface and as a sampling zone (4). The eluent application zone may be used as a sampling zone. The test strip is connected to a preferably flexurally rigid test strip holder (6), which does not cover the sampling zone (4).

Abstract: A device is provided for taking swab samples and sample dilution. The device has a plug made of a porous, absorbent material, which projects from a sleeve and is used to take a swab sample. The plug is located in one end of the sleeve. A piston, which can be moved in the sleeve by means of a piston rod, is located in the other end of the sleeve. A closure, which can be opened by means of pressure, is located between the piston and the plug, so that a liquid arranged between the piston and the plug moves through the closure to the plug and wets same on actuation of the piston rod.

Abstract: A process for detecting dust-associated substances wherein the dust to be analyzed is brought together with a solvent for eluting the substance to be detected from the dust. The particulate components are retained by means of a filter matrix while the solvent and the substances dissolved and/or suspended therein are transported through the filter matrix by capillary liquid transport. The solvent and the substances dissolved and/or suspended therein are transferred into a reaction matrix adjoining the filter matrix by capillary liquid transport. The substance to be detected is detected in the reaction matrix by means of a chemical and/or biochemical reaction or by the failure of a chemical and/or biochemical reaction to take place. A device for detecting dust-associated substances preferably contains, besides the filter matrix and the reaction matrix, a container for receiving the dust to be analyzed, wherein the container is in liquid connection with the filter matrix.