A processing station in motor vehicle assembly lines has two receiving frames, for a motor vehicle part, which are mounted on associated columns at mutually spaced locations in a synchronously height-adjustable manner and are synchronously revolvable about mutually aligned horizontal axes of rotation. The dialysate chemical formulations for one batch of dialysate comprise an acid concentrate stored in a first vessel, and a citrate-containing bicarbonate concentrate stored in a second vessel. In certain embodiments, the ligand is a steroid or aromatic compound. A load transfer member is attached to the mandrel, providing a free end portion that is attached to a cable.