Journal of Chemical and Engineering Data, Vol.52, No.3, 859-862, 2007
Liquid-liquid equilibria of aqueous two-phase poly(vinylpyrrolidone) and K(2)HPO(4)/KH(2)PO(4) buffer: Effects of pH and temperature
Liquid-liquid equilibrium data of polyvinylpyrrolidone + K(2)HPO(4)/KH(2)PO(4) buffer were measured at (298.15, 308.15, and 318.15) K and pH 5 and pH 7. The binodal curves were described using a three-parameter equation, and the tie lines were described using the Othmer-Tobias equation together with a two-parameter equation.