The effect of sulphate salts on the salting-out effect and phase separation in aqueous solutions of poly ethylene glycol and sulphate salts at 298.15 and 308.15 K.

In this manuscript the binodal data of poly(ethylen glycol) PEG2000 + salt (MgSO4, Na2SO4, (NH4)2SO4, Al2(SO4)3 and ZnSO4) + H2O systems atT=298.15 and 308.15K have been studied. Besides the effect of salts and temprature on the binodal curves of the is considered. Finally the salting-out ability of salts onthe polymer has been studied. For sulphate salts, the relative effectiveness of the cations in inducing the phasesegregation in aqueous two-phase systems (ATPSs)follows the Hofmeister series

Keywords:

Liquid-Liquid equilibrium , PEG , binodal curves , salting-out , aqueous two-phase systems