Biblioteca Digital do Instituto Politécnico de Bragança   Instituto Politécnico de Bragança

Biblioteca Digital do IPB >
Escola Superior de Tecnologia e Gestão >
Tecnologia Química e Biológica >
DTQB - Artigos em Revistas Indexados ao ISI >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/1730

Título: Effect of KCl and Na2SO4 on the solubility of glycine and DL-alanine in water at 298.15 K
Autor: Ferreira, Luísa
Macedo, Eugénia A.
Pinho, Simão
Palavras-chave: Solubility
Amino acids
Electrolyte
Issue Date: 2005
Editora: ACS
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
Resumo: 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.
URI: http://hdl.handle.net/10198/1730
ISSN: 1520-5045
Versão do Editor: http://pubs.acs.org/page/iecred/about.html
Appears in Collections:DTQB - Artigos em Revistas Indexados ao ISI

Files in This Item:

File Description SizeFormat
IECR2005.pdf108,91 kBAdobe PDFView/Open
Restrict Access. You can request a copy!
IECR2005- resumo.pdf34,27 kBAdobe PDFView/Open
Statistics
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 


  © Instituto Politécnico de Bragança - Biblioteca Digital - Feedback - Statistics
  Estamos no RCAAP Governo Português separator Ministério da Educação e Ciência   Fundação para a Ciência e a Tecnologia

Financiado por:

POS_C UE