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Solubility of L-histidine in different aqueous binary solvent mixtures from 283.15 K to 318.15 K with experimental measurement and thermodynamic modelling.
- Source :
-
Journal of Chemical Thermodynamics . Feb2017, Vol. 105, p1-14. 14p. - Publication Year :
- 2017
-
Abstract
- In this study, the solubility of L-histidine in three different binary solvents, including (water + acetone), (water + ethanol) and (water + 2-propanol), was measured over temperatures from 283.15 K to 318.15 K by employing a gravimetric method at atmospheric pressure. It was found that the solubility of L-histidine in the binary mixed solvents increases with the increasing temperature at a given solvent composition, whereas it decreases with the rise of mole fraction of organic solvents. The experimental results were well correlated by the modified Apelblat equation, CNIBS/R-K model, combined version of the Jouyban-Acree model and NRTL model, respectively. This shows that these models can correlate the solubility in three binary mixed solvents accurately. Furthermore, the mixing thermodynamic properties of L-histidine in different binary solvent mixtures were also calculated based on the NRTL model. The result indicates that the mixing process of L-histidine is endothermic and spontaneous. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SOLUBILITY
*HISTIDINE
*BINARY mixtures
*SOLVENT extraction
*THERMODYNAMIC functions
Subjects
Details
- Language :
- English
- ISSN :
- 00219614
- Volume :
- 105
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Thermodynamics
- Publication Type :
- Academic Journal
- Accession number :
- 119783339
- Full Text :
- https://doi.org/10.1016/j.jct.2016.09.039