Influence of the temperature and type of salt on the phase equilibrium of peg 1500 + potassium phosphate and peg 1500 + sodium citrate aqueous two-phase systems

Química Nova

Carolina P. Carvalho²  Jane Sélia R. Coimbra²  Isabele Andressa F. Costa²  Luis Antonio Minim²  Maria Cristina Maffia²  Luis Henrique M. Silva¹ 

[1] ,Universidade Federal de Viçosa Departamento de Tecnologia de Alimentos Viçosa MG ,Brazil

关键词: aqueous two-phase systems;    equilibrium data;    salts;   

DOI  :  10.1590/S0100-40422008000200004

来源: SciELO

【 摘 要 】

The present work analyzed the effect of the temperature and type of salt on the phase equilibrium of aqueous two-phase systems (ATPS) formed by poly (ethylene glycol) (PEG) 1500 + potassium phosphate, from (278.15 to 318.15) K, and PEG 1500 + sodium citrate, from (278.15 to 298.15) K. The rise of the temperature normally increased the slope of the tie line (STL). With respect to the influence of the type of salt, sodium citrate showed better capability to induce phase separation, when compared to potassium phosphate.

【 授权许可】

CC BY-NC   
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