Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/16790
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Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Ferreira, Luísa A. | - |
dc.contributor.author | Teixeira, J. A. | - |
dc.date.accessioned | 2012-02-03T15:03:44Z | - |
dc.date.available | 2012-02-03T15:03:44Z | - |
dc.date.issued | 2011 | - |
dc.date.submitted | 2010 | - |
dc.identifier.issn | 0021-9568 | por |
dc.identifier.uri | https://hdl.handle.net/1822/16790 | - |
dc.description.abstract | The effect of added salt (NaCl or KCl) on the polyethylene glycol 8000 (PEG)−sodium sulfate (Na2SO4) aqueous two-phase system (ATPS), containing 0.01 mol·L−1 of sodium phosphate buffer (NaPB), pH 7.4, has been investigated at 296.15 K. Phase diagrams determined by the cloud point method, including tie-lines assigned from mass phase ratios according to the lever arm rule, are presented for the different PEG 8000−Na2SO4 ATPSs, all containing 0.01 mol·L−1 NaPB, pH 7.4, and increasing the concentration of a neutral salt, such as NaCl or KCl, up to 1.0 mol·L−1. Experimental binodal results were satisfactorily correlated with an empirical mathematical model, the Merchuk equation. The results indicate that the addition of both salts causes a depression of the binodal relatively to that for the salt-free system. The salting-out ability of the cations follows the Hofmeister series (Na+ > K+) and can be related to the ions Gibbs free energy of hydration (ΔGhyd). | por |
dc.description.sponsorship | L.A.F. acknowledges the financial support (SFRH/BPD/47607/2008) from Fundacao para a Ciencia e a Tecnologia (Lisboa, Portugal). | por |
dc.language.iso | eng | por |
dc.publisher | American Chemical Society | por |
dc.rights | openAccess | por |
dc.title | Salt effect on the aqueous two-phase system PEG 8000-sodium sulfate | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 133 | por |
oaire.citationEndPage | 137 | por |
oaire.citationIssue | 1 | por |
oaire.citationTitle | Journal of Chemical and Engineering Data | por |
oaire.citationVolume | 56 | por |
dc.identifier.doi | 10.1021/je1010467 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Journal of Chemical and Engineering Data | por |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |