Abstract: Use of a support material for capillary electrochromatography (CEC), characterized in that the support material has a porous design and a surface which consists of an outer surface and a pore surface, wherein the outer surface has regions of different derivatization and/or functionality from that of the pore surface.

Abstract: The use of a support material for capillary electrochromatography is disclosed, wherein the support material, which is based on a base material containing hydroxy groups, has reversed phases which are limited to the inner surfaces of porous particles, said reversed phases consisting of fatty acid residues. Further, separating capillaries suitable for such a use are disclosed.

Abstract: An end element (10) for capillaries of chip channels for use in capillary electrophoresis or in electrochromatography or in high performance liquid chromatography comprises an attachment member (12) and a liquid-permeable membrane (14). The attachment member (12) is connected to the capillary (16) or the chip channel. The liquid-permeable membrane (14) serves for terminating the capillary (16) or the chip channel and is provided for retaining carrier material (18) contained in the capillary (16) or the chip channel. The liquid permeable membrane (14) comprises a microsieve or porous film.

Abstract: Process for the selective separation of electrically charged target molecules in an analytical mixture by means of capillary affinity gel electrophoresis, using a capillary tube which is at least partly filled with a polymer gel, whereby receptors for target molecules are covalently bound to the polymer, and an electric field of at least 50 volts/cm is applied, characterized in that (a) the capillary tube is charged with the analytical mixture, (b) in a first separation stage the target molecules in the analytical mixture are bound to the receptors and the remaining components are eluted, optionally while splitting open, and (c) in a second stage of the process the elution conditions are changed, optionally in stages, so that the affinity of the target molecules for the receptor is eliminated and the target molecules are eluted and detected, optionally whilst splitting open.

Abstract: Use of a support material for capillary electrochromatography (CEC), characterized in that the support material has a porous design and a surface which consists of an outer surface and a pore surface, wherein the outer surface has regions of different derivatization and/or functionality from that of the pore surface.