Personalization Model for E-marking

In a centrifuge attachment for use in counter current chromatography, a centrifuge plate rotatable about a central axis carries either two or more convoluted (e.g. straight helical) coils or a single convoluted coil arranged as a toroid, the tube or tubes being convoluted about an axis of convolution which is generally perpendicular to the local direction of the centrifugal force generated by rotation of the plate. Inlet and outlet tubes are provided in a known manner such that they do not twist and the convulated coil is rotated about its axis of convolution at a speed which is independent of the speed of rotation of the centrifuge plate.