| Modeling of drug solubility and its experimental determination using automated techniques have great impor-
tance in the pharmaceutical industry. Mesalazine solubility was measured in a non-aqueous system of propylene
glycol and ethanol at various temperatures using an updated laser-based monitoring combined with gravimetric
measurement. The obtained solubility data were fitted to diverse cosolvency models including the van't Hoff, the
mixture response surface, the Yalkowsky, the Jouyban-Acree, the Jouyban-Acree-van't Hoff, and the modified
Wilson models, and the mean relative deviations of the predicted solubility data by the mentioned models
were calculated. Furthermore, the apparent thermodynamic properties of mesalazine dissolution process were
computed by using the van't Hoff and Gibbs equations. The combined usage of the automated solubility monitor-
ing together with thermodynamic modeling is deemed as highly promising for the pharmaceutical industry and
particular results of mesalazine add to a database of drug solubility. |