Measurement of activity coefficients of amino acids in aqueous electrolyte solutions: experimental data for the systems (H2O + NaBr + glycine) and (H2O + NaBr + l-valine) at T=298.15 K |
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| Affiliation: | 1. Department of Chemistry, Amirkabir University of Technology, Tehran, Iran;2. Department of Chemical Engineering, Sharif University of Technology, Tehran, Iran;3. Hyprotech Ltd., 300, 1110 Centre Street North, Calgary, Alta., Canada T2E 2R2;1. Department of Physics, Persian Gulf University, Bushehr 75169, Iran;2. Department of Physics, Yasouj University, Yasouj 75914, Iran;1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, PR China;2. University of Chinese Academy of Sciences, Beijing, 100049, PR China;1. Department of Bioscience Engineering, Faculty of Sciences, University of Antwerp, Groenenborgerlaan 171, BE-2020 Antwerp, Belgium;2. Land and Water Management Unit, Flemish Institute for Technological Research, Boeretang 200, BE-2400 Mol, Belgium;3. Laboratory of Biomedical Physics, Groenenborgerlaan 171, B-2020 Antwerp, Belgium |
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| Abstract: | Electrochemical cells with two ion-selective electrodes, a cation ion-selective electrode against an anion ion-selective electrode, were used to measure the activity coefficient of amino acids in aqueous electrolyte solutions. Activity coefficient data were measured for (H2O + NaBr + glycine) and (H2O + NaBr + l-valine) at T=298.15 K. The maximum concentrations of sodium bromide, glycine, and l-valine were (1.0, 2.4, and 0.4) mol · kg−1, respectively. The results show that the presence of an electrolyte and the nature of both the cation and the anion of the electrolyte have significant effects on the activity coefficients of amino acid in aqueous electrolyte solutions. |
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