Source:http://linkedlifedata.com/resource/umls/id/C0016640
MSH: Separation of a mixture in successive stages, each stage removing from the mixture some proportion of one of the substances, for example by differential solubility in water-solvent mixtures. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed),NCI: Methods of fractionation, isolation, and purification based on the physico-chemical properties of the substance, e.g. crystallization, distillation, solubility (miscibility).