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Orientador(es)
Resumo(s)
The solubility of glycine and DL-alanine in aqueous systems of KCl and Na2SO4 at 298.15 K was
measured at different salt concentrations using the analytical gravimetric method. The
experimental data obtained in this work and those previously reported in the literature for the
same systems were compared, and it was possible to show a big discrepancy for the water-
KCl-amino acid systems and a very satisfactory agreement for the water-Na2SO4-amino acid
systems. The solubility data from this work and the activity coefficients data from literature
were used to explore the potentialities of the Pitzer-Simonson-Clegg equations for the
thermodynamic description of the ternary systems water-KCl with glycine or DL-alanine at
298.15 K. This model, with five adjustable parameters, gives a global root-mean-square deviation
of 0.0036 for the correlation of the activity coefficients and 0.63 g/(kg of water) for the solubility
in those ternary systems.
Descrição
Palavras-chave
Solubility Amino acids Electrolyte
Contexto Educativo
Citação
Ferreira, Luísa; Macedo, Eugénia; Pinho, Simão (2005). Effect of KCl and Na2SO4 on the solubility of glycine and DL-alanine in water at 298.15 K. Industrial Engineering Chemistry Research. ISSN 1520-5045. 44:23 p.8892-8898
Editora
ACS