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 |
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| Institution: | 1. School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi''an, 710021, China;2. Heilongjiang University of Science and Technology, Harbin 150027, China;3. Harbin institute of Technology, Harbin 150001, China;1. Young Researchers and Elite Club, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran;2. Discipline of Chemical Engineering, School of Engineering, University of KwaZulu-Natal, Howard College Campus, King George V Avenue, Durban 4041, South Africa;3. Institut de Recherche en Génie Chimique et Pétrolier (IRGCP), Paris Cedex, France;4. Département de Génie des Mines, de la Métallurgie et des Matériaux, Faculté des Sciences et de Génie, Université Laval, Québec, QC, G1V 0A6, Canada |
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| Abstract: | Electrochemical cells with two ion-selective electrodes against a single-junction reference electrode were used to obtain the activity coefficients of glycine in aqueous electrolyte solutions. Activity coefficient data were presented for {H2O + KCl (mS) + glycine (mA)}, and {H2O + NaCl (mS) + glycine (mA)} atT = 298.15 K and T = 308.15 K, respectively. The results show that the presence of an electrolyte and the nature of its cation have a significant effect on the activity coefficient of glycine in aqueous electrolyte solutions and, in turn, on the method of separation from its culture media. The results of the mean ionic activity coefficients of KCl were compared with those values reported in the literature, which were obtained by the isopiestic method. It was found that the method applied in this study provides accurate activity coefficient data. The effect of temperature on the mean ionic activity coefficient of NaCl in presence of glycine was also investigated. |
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