Measurement and correlation of solubility of d-sorbitol in different solvents

The solubility of d -sorbitol was measured in methanol, ethanol, n-propanol, n-butanol, THF, acetone, ethyl acetate and acetonitrile at temperatures ranging from 278.15 to 333.15   K under atmospheric pressure by gravimetric method. The solubility data were correlated with modified Apelblat equation and λh equation which showed that the solubility of d -sorbitol in these organic solvents increased with increasing temperature. The thermodynamic properties of the dissolution process, including enthalpy, entropy and Gibbs energy , were calculated by means of van't Hoff analysis and Gibbs equation. According to the experimental results, ethanol showed to be a relatively better solvent in crystallization process of d -sorbitol.