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

Universidade Federal de Viçosa, Viçosa, Brazil¹  Minim, Luis Antonio¹  Carvalho, Carolina P.¹  Coimbra, Jane Sélia R.¹  Costa, Isabele Andressa F.¹  Silva, Luis Henrique M.¹  Maffia, Maria Cristina¹ 

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

DOI  :  10.1590/S0100-40422008000200004

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown