Activity coefficients of glycine in aqueous electrolyte solutions: experimental data for (H2O+ KCl + glycine) atT= 298.15 K and (H2O + NaCl + glycine) atT= 308.15 K

Activity coefficients of electrolyte and amino acid in the systems (water + potassium chloride +dl -valine) at T=298.15 K and (water + sodium chloride +l -valine) at T= 308.15 K

“…For comparison, this figure also indicates the values of the trace activity coefficients of DL-valine in the presence of NaCl and those of glycine in the presence of KCl obtained from the previous works. (15,16) From this figure, it can be seen that the trace activity coefficients of DLvaline in the presence of NaCl and KCl are close to each other at low electrolyte molalities and slightly deviate at higher electrolyte molalities. A reason for this phenomenon can be explained by the fact that at infinite dilution the electrostatic forces are the most dominant forces, and nature of the electrolyte, which has a short-range interaction effect, does not play a major role on the interactions of DL-valine with ions.…”

Thermodynamics of the ternary systems: (water + glycine, l-alanine and l-serine + di-ammonium hydrogen citrate) from volumetric, compressibility, and (vapour + liquid) equilibria measurements

“…The relation for the activity coefficient of a species i in the system can be obtained from appropriate differentiation of equation (14).…”

“…Although thermodynamic properties (such as volumetric and viscometric behaviour) of amino acids in aqueous electrolyte solutions have been extensively studied by many research groups [7], there are only few studies about (vapour + liquid) equilibrium (VLE) of amino acids in aqueous electrolyte solutions in the literature and all of them are limited to T = 298. 15 K and have been reported by only few research groups [8][9][10][11][12][13][14][15][16][17][18][19][20]. Knowledge of the (vapour + liquid) equilibria of amino acids in aqueous solutions is of practical and theoretical interest to determine the thermodynamic properties of these systems and in the elucidation of solute-solute and solute-water interactions as well as in the design of industrial separation and purification processes.…”

Measurement and modelling of static dielectric constants of aqueous solutions of methanol, ethanol and acetic acid at T=293.15K and 91.3kPa

“…The dielectric constant of a solvent is a relative measure of its polarity and its measurements are often used for evaluation of characteristics of liquid solutions [5]. This property can also be very useful as a support for the efficient design, simulation of separation processes, sample preparation and chromatography techniques in analytical chemistry [6,7]. Additionally, dielectric constants can be used to calculate the ionic activity coefficients of electrolyte solutions at any temperature and composition [8].…”