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http://dx.doi.org/10.9713/kcer.2012.50.1.093

Modeling and Measurements of the Activity Coefficients and Solubilities of Amino Acids in the L-valine/electrolyte and L-proline/electrolyte Aqueous Solutions  

Lee, Bong-Seop (Department of Chemical Engineering, Kangwon National University)
Kim, Ki-Chang (Department of Chemical Engineering, Kangwon National University)
Publication Information
Korean Chemical Engineering Research / v.50, no.1, 2012 , pp. 93-105 More about this Journal
Abstract
Activity coefficients and solubilities of L-Valine and L-Proline in aqueous solutions containing each of four electrolytes such as NaCl, KCl, $NaNO_3$ and $KNO_3$ were measured at 298.15 K. The measurements of activity coefficients were carried out in the electrochemical cell coupled with two ion-selective electrodes (cation and anion), and the solubilities were measured by the gravimetric analysis of saturated solutions in equilibrium with the solid phase of amino acid. The measured activity coefficients of electrolytes and amino acids were correlated with the theoretical thermodynamic model presented in the previous work [Korean Chem. Eng. Res. 48(4), 519(2010)]. It was found that the activity coefficients of amino acids and electrolytes described based on the our previous model were well agreeable with experimental data. Also the experimental solubility data of L-Valine and L-Proline were successfully correlated with the thermodynamic relation mentioned in the previous work.
Keywords
Electrolyte; Amino Acid; Activity Coefficient; Solubility;
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