Artículos de revistas
Aqueous two-phase systems of poly(ethylene glycol) and sodium citrate: Experimental results and modeling
Registro en:
Journal Of Chemical And Engineering Data. Amer Chemical Soc, v. 53, n. 7, n. 1587, n. 1594, 2008.
0021-9568
WOS:000257543300031
10.1021/je800137f
Autor
Alves, JGLF
Brenneisen, J
Ninni, L
Meirelles, AJA
Maurer, G
Institución
Resumen
Aqueous two-phase systems of poly(ethylene) glycol and a salt are considered as extraction media for large-scale downstream processing of industrially important enzymes. The present paper deals with one of such two-phase systems. New experimental results are presented for the composition of the coexisting liquid phases of the system (water + poly(ethylene glycol) + sodium citrate) at 298.15 K for three poly(ethylene) glycols of different molar masses of about (600, 1500, and 3000) g.mol(-1), respectively. The experimental results are described within experimental uncertainty by a semiempirical expression for the excess Gibbs energy. 53 7 1587 1594