a centrifugal fast chromatograph is disclosed . the apparatus includes a rotor , a rotor drive , a plurality of chromatographic columns mounted on the rotor , a transfer disk mounted on the rotor , photodetecting apparatus , a gradient maker and a microprocessor control system . the microprocessor controls and monitors the entire chromatograpy process . the centrifugal fast chromatograph permits the performance of multiple , rapid , and simultaneous separations .