Countercurrent Chromatography Using a Toroidal Coil Planet-Centrifuge: A Comparative Study of the Separation of Organelles Using Aqueous Two-Phase Partition

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Abstract
A toroidal coil planet centrifuge is described and compared with other countercurrent chromatography (CCC) and countercurrent distribution (CCD) techniques. The basis of separation is partition in aqueous two-phase polymer systems, with each method assessed by fractionating rat liver organelles. The size and ease of operation of the toroidal coil planet centrifuge gave significant advantages over conventional CCD systems achieving equivalent resolution in a fraction of the time.