lahuses olevate lahustunud ainete ja kolloidide üksteisest eraldamine poolläbilaskva membraani abil, mida esimesed läbivad, teised mitte
the separation of small molecules from large molecules and colloids in a solution by the selective diffusion of the small molecules through a semipermeable membrane
Separation by dialysis is a slow process, depending for its speed on the differences in particle size and diffusion rates between the colloidal and the crystalloidal constituents, and may be accelerated by heating or, if the crystalloids are charged, by applying an electric field (electrodialysis).