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Thermodynamic properties of aqueous glucose-urea-salt systems
422 viewed

Thermodynamic properties of aqueous glucose-urea-salt systems

Sadeghi, M

Thermodynamic properties of aqueous glucose-urea-salt systems

Sadeghi, M ; Sharif University of Technology

422 Viewed
  1. Type of Document: Article
  2. DOI: 10.1007/s10953-014-0192-1
  3. Abstract:
  4. In this work, the thermodynamic behavior of aqueous solutions containing the solutes NaCl, glucose, and/or urea is investigated. These substances are vital components for living bodies and further they are main components of blood serum. Osmotic coefficients were determined by cryoscopic measurements in single-solute and multi-solute aqueous solutions containing salts (NaCl, KCl, CaCl2), glucose, and/or urea. The results show that NaCl determines the osmotic coefficients in the urea/glucose/NaCl/water system. Investigation of the effect of different salts on osmotic coefficients revealed ion-specific effects. At physiologically important solute concentrations in typical blood serum solutions, the osmotic coefficients were found to be in the range of 0.90-0.93. In a second step, the state of water in different glucose/salt/water and urea/salt/water systems was investigated. Depending on the kind of salt, the chemical potential of water in urea/salt/water is either higher or lower than in glucose/salt/water systems at equal nonelectrolyte concentrations. This result was found to be independent of the salt molality. Finally, the investigated systems were modeled with the Pitzer model and the ePC-SAFT equation of state, which allowed predicting of the properties of these multi-solute aqueous solutions
  5. Keywords:
  6. Blood osmolality ; EPC-SAFT ; Osmotic coefficient ; Salt-biomolecule interaction
  7. Source: Journal of Solution Chemistry ; Volume 43, Issue 6 , June , 2014 , Pages 1110-1131 ; ISSN: 00959782
  8. URL: http://link.springer.com/article/10.1007/s10953-014-0192-1