A system for the separation of magnetically attractable microparticles which are suspended in a liquid, which includes a magnet arrangement having at least two magnets in ring form, the magnet axis of which is oriented perpendicular to the ring plane, and the magnets are arranged above one another in the same direction or in opposite directions, and the ring inner spaces form a space for receiving a vessel. The invention also relates to methods for the separation of microparticles and to a system for the separation and suspension of microparticles in vessels including a magnet arrangement as described above and a vessel holder and a movement device for moving a vessel in the vessel holder in order to obtain a suspension of separated microparticles.