Calculation of solidʹs solubilities in mixed liquid solvents by the λh equation using mixing rules

Based on the proposed mixing rules for λ and h, the λh equation was extended to calculate the solubilities of solids in mixed liquid solvents. The correlation results for 89 pairs of binary solvent systems and 4 pairs of quaternary solvent systems showed that the extended equation had good agreement with experimental data. Furthermore, a prediction method was given with no parameter adjustment, which was suitable for nonalcohol-solvent systems.