Solution is placed in a bag of the membrane and the solvent is evaporated off

• The concentration of a colloidal solution whose colloid will not pass through a semipermeable membrane

Wiktionary Word definitions in Wiktionary
n. (context chemistry English) A technique whereby the components of a mixture of two liquids are separated by selective permeation through a semipermeable membrane, the component that passes through the membrane being removed by evaporation

WordNet Word definitions in WordNet
n. the concentration of a colloidal solution whose colloid will not pass through a semipermeable membrane; solution is placed in a bag of the membrane and the solvent is evaporated off

Wikipedia Word definitions in Wikipedia
Pervaporation (or pervaporative separation) is a processing method for the separation of mixtures of liquids by partial vaporization through a non-porous or porous membrane .