Distribution in a biphasic system formed by two aqueous solutions containing structurally incompatible components (two polymers or a polymer and a salt) above a critical concentration.
Source:
PAC, 2016, 88, 517. 'Glossary of terms used in extraction (IUPAC Recommendations 2016)' on page 536 (https://doi.org/10.1515/pac-2015-0903)