Abstract: The present invention is directed to an apparatus for the insertion of carrier elements with comb-like titer strips into a microtiter plate and to provide a convenient holder for washing the titer strips. The apparatus provides a container and a changing insert with guide lamellas and space rods for holding the carrier elements.

Abstract: A carrier coated with antibodies or antigens is proposed, which performs a serological reaction with human, animal or plant material to be investigated and which is received in a multi-well plate. The carrier is made from nitrocellulose or a material having the adsorption characteristics of nitrocellulose and its shape is adapted to the multi-well plate used for performing serological reactions and is introduced into the latter. A plastic reinforcing structure provides support for the coated carrier. The coated carrier is not completely bound to the plastic reinforcing structure, so that both sides of the carrier will be contacted by material in the multi-well plate.