polymer-rich phase

Synonym: concentrated phase
https://doi.org/10.1351/goldbook.P04745
That phase of a two-phase equilibrium system, consisting of a polymer and low @M04000@ material, in which the polymer concentration is higher. The use of the name '@G02600@ phase' is discouraged. Synonymous with concentrated phase.
Source:
Purple Book, 1st ed., p. 68 [Terms] [Book]