The approach of using T(r) at DELTAZ = Z(V)s - Z(L)s = 0.5 for a balanced representation of saturated volumes (V(L)s and V(V)s) of pure components has been extended from non-polar fluids to water and ammonia. For the mixtures of these two compounds, the average absolute percentage deviation in the calculated V(L)s values is less than 2% without affecting the representation of vapor-liquid equilibrium values.