Abstract: The invention concerns a device for the capillary transport of a liquid between two opposite, essentially planar layers, in which the two layers are arranged parallel to one another at such a distance that there is a capillary-active gap between the two layers, wherein at least one of the two layers contains at least two discrete adjacent parts and capillary-active transport of the liquid is possible beyond the common boundary of the parts that lie in one layer.

Abstract: An aqueous control liquid is provided that contains glucose at a known concentration and cyclodextrin. A method is also provided that binds a wetting agent from a region of a test element that comes into contact with a sample. The method includes contacting the region with a control liquid that has a substance selected from the group of cyclodextrin derivatives and dispersed materials having a specific surface of 100 m2/g to over 1000 m2/g. A method for controlling the function of a measuring system having test strips and a measuring instrument for the determination of glucose in liquid samples is provided that includes contacting the test strip with a control liquid containing glucose at a known concentration and at least one substance selected from the group consisting of cyclodextrins and cyclodextrin derivatives and detecting a signal caused by the glucose contained in the control liquid.

Abstract: The invention concerns an analytical test element for the determination of an analyte in a liquid containing a detection element and a channel capable of capillary liquid transport which has a sample application opening at one end of the channel capable of capillary liquid transport, wherein the channel capable of capillary liquid transport is continuously narrowed from the sample application opening in the direction of capillary transport at least up to the beginning of the detection element. In addition it also concerns the use of the said analytical test element for the determination of an analyte in a liquid as well as a method for determining an analyte in a liquid sample with the aid of the said analytical test element.

Abstract: The invention concerns an aqueous control liquid (control solution) containing glucose at a known concentration and at least one substance selected from the group comprising cyclodextrins, cyclodextrin derivatives and finely dispersed materials having a large specific surface.

Abstract: A sample application zone and detection zone are arranged on a pile-like complex made of a fleece and a porous membrane which are in a direct or indirect contact that enables passage of liquid through the contact area and the membrane is a polyamide, polyvinylidene difluoride, polyether sulfone or polysulfone membrane which transports liquid significantly slower over the area than the fleece.

Abstract: An analytical device determines the analytes in a liquid sample. This device includes a layer of flat material which has a sample application area and a detection area thereupon. The detection area includes a reagent for determining the analyte, and the absorbent sample application area and the absorbent detection area are disposed within a liquid impermeable boundary. The layer of flat material also includes an absorbent connector which is disposed such that the sample application area and the detection area are connected by the absorbent connector. The liquid impermeable boundary and the absorbent connector prevents liquid from being transported between the sample application area and the detection area, except through the absorbent connector.