An apparatus for counter-current distribution in a centrifugal acceleration field.

An apparatus is described that reduces the time required for counter-current distribution in aqueous polymer two-phase systems by a factor of more than five. Phase settling, which has been the time consuming step, is here facilitated by centrifugation. The crucial point in the construction, that allows automatization, is that the transfer step in the counter-current distribution cycle is performed during centrifugation.