Physical Properties of Choline chloride+K3PO4+H2O System

Aqueous two-phase systems (ATPSs) are used for separating biological compounds. Recently, ATPSs consisting of choline chloride and a kosmotropic salt as very efficient systems have been attracted due to its superiority and application in various industries, researchers have recently focused their attention on physical properties such as density, viscosity, and surface tension. In this study, some physical properties of an aqueous two-phase system consisting of choline chloride, tri-potassium phosphate and water have been measured and the effect of the concentration of phosphate salt on the physical properties has been investigated. The results show that the density and viscosity increase with an increase in the concentration of phosphate salt while the surface tension decreases with the increase in the phosphate concentration. Furthermore, the viscosity of the current system is significantly lower than the viscosity of polymer-based ATPSs.