Determination of equilibrium states in multi-phase systems

Volume corrections in calculation of equilibrium state for multi-phase systems, as an extension from one-phase systems, have been described. The algorithms can handle with one, two, three or more phases of different volumes. Several applications of the algorithms to calculation of equilibrium concentrations of all species in two- and three-phase systems have been presented. Different possibilities of the determination of equilibrium constants from extraction data have been discussed.