moving, by a moving arrangement, a substantially triangular or rectangular, slide in a device comprising said moving arrangement and a base body with a bottom plate configured to receive said slide, from a parallel incubating position, relative to a bottom plate within said base body, to a non-parallel collecting position, relative to the bottom plate within said base body,

wherein said base body comprises walls, which are sealingly connected to said bottom plate and which limit the movement of said slide relative to said bottom plate within said base body,

wherein, in said parallel incubating position, a capillary gap is formed between said slide and said bottom plate,

wherein, in said non-parallel collecting position, only a single corner section of said slide is positioned such that said liquid is collected in said single corner section of said slide as well as in a corresponding corner section of said base body formed by said bottom plate and two of said walls, and

wherein said biological material is located on the side of said slide facing toward said capillary gap.