1. Concentration effect of sodium chloride on enthalpic interaction coefficients of D-mannitol and D-sorbitol in aqueous solution
- Author
-
Lin Wei Li, Xiao-Mei Qiu, Lan-Ying Zhu, You-Ying Di, and De Zhi Sun
- Subjects
Isothermal microcalorimetry ,Chromatography ,Aqueous solution ,Chemistry ,Sodium ,Inorganic chemistry ,Enthalpy ,Concentration effect ,chemistry.chemical_element ,Condensed Matter Physics ,Dilution ,chemistry.chemical_compound ,Sorbitol ,Physical and Theoretical Chemistry ,Solvent effects - Abstract
The dilution enthalpies of D-mannitol and D-sorbitol in aqueous sodium chloride solution at various concentrations have been determined by isothermal microcalorimetry at 298.15 K. The homogeneous enthalpic interaction coefficients over a quite large range of concentration of aqueous sodium chloride solutions have been calculated according to the excess enthalpy concept. The results show that enthalpic pairwise interaction coefficients (h 2) of D-mannitol and D-sorbitol are positive in aqueous sodium chloride solution and become more positive with increase of the concentration of sodium chloride. The results are interpreted in terms of the different conformations of the two polyols, solute-solute and solute-solvent interactions involved by solvent effects.
- Published
- 2007