Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/10693
Título: | Liquid-liquid equilibria of UCON + (sodium or potassium) phosphate salt aqueous two-phase systems at 23 °C |
Autor(es): | Silvério, Sara C. Rodríguez, Oscar Teixeira, J. A. Macedo, Eugénia |
Data: | Mar-2010 |
Editora: | American Chemical Society |
Revista: | Journal of Chemical & Engineering Data |
Citação: | "Journal of Chemical & Engineering Data". ISSN 0021-9568. 55:3 (2010) 1285-1288. |
Resumo(s): | Six phase diagrams for UCON−phosphate salt aqueous two-phase systems (ATPSs), at 23 °C, are presented. The ATPSs were obtained combining UCON (a random copolymer of 50 % ethylene oxide and 50 % propylene oxide) and a phosphate salt (KH2PO4, K2HPO4, potassium phosphate buffer pH = 7, NaH2PO4, Na2HPO4, and sodium phosphate buffer pH = 7). Among the salts used, Na2HPO4 proved to be the most effective in ATPS formation, providing the greatest heterogeneous region in the phase diagram. The previous established relation between the anion valence and the concentration needed to form a biphasic system was confirmed: higher valence requires lower concentration. Na+ salts require, in all cases, lower concentration to form ATPSs than the corresponding K+ salts. The size of the heterogeneous region in the phase diagrams increases with an increase of the pH value of the salt used in ATPS preparation. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/10693 |
DOI: | 10.1021/je900628m |
ISSN: | 0021-9568 1520-5134 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Silvério_Journal of Chemical and Engineering Data.pdf | 304,33 kB | Adobe PDF | Ver/Abrir |