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Citation: Chen Li, Xiao Jin-Xin, Ma Ji-Ming. Aqueous Two-phase System of Catanionic Surfactant Mixtures Formed by Adding Salts[J]. Acta Physico-Chimica Sinica, ;2003, 19(07): 577-579. doi: 10.3866/PKU.WHXB20030701 shu

Aqueous Two-phase System of Catanionic Surfactant Mixtures Formed by Adding Salts

1.
College of Chemistry and Molecular Engineering, Peking University, Beijing　100871

Received Date: 11 April 2003
Available Online: 15 July 2003

The equimolar mixed system of decyltriethylammonium bromide and sodium decylsulfonate, which was homogeneous solution even with the total surfactant concentration increasing up to 0.2 mol•L－1, formed aqueous two-phase system(ATPS) when salts, such as NaF, Na2SO4 or Na3PO4, were added. The phase behavior and partitioning of BSA in this saltinduced ATPS were studied. Compared with the usual ATPS of catanionic surfactant mixtures, this salt-induced ATPS exhibited some special advantages, and overcame some shortcomings of the usual ATPS. It was shown that the phase behavior of this salt-induced ATPS could be adjusted by adding salts and the partition coefficient of BSA could be altered and optimized by salt species.
- Catanionic surfactant mixtures;Aqueous two-phase system(ATPS);　Protein partitioning
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