Abstract
Abstract For the purification of up to 1000 mg of synthetic peptides by countercurrent chromatography, the coil planet centrifuges have proven useful in the research laboratory. Besides the earlier described horizontal flow-through coil planet centrifuge which chromatographs substances in all solvent systems at room temperature, the multi-layer coil planet centrifuge affords more rapid chromatography. However, separations using n-butanol, especially suited for peptides, have to be conducted at elevated temperatures. A new machine that has characteristics of both of the foregoing instruments is the compact horizontal flow-through coil planet centrifuge which promises rapid chromatography with full retention of the stationary phase.
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