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

Quimica nova

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 

[1] Universidade Federal de Viçosa, Viçosa, Brazil

关键词: aqueous two-phase systems;    equilibriumdata;    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 temperatureand type of salt on the phase equilibrium of aqueous two-phase systems (ATPS)formed by poly (ethylene glycol) (PEG) 1500 + potassium phosphate, from (278.15to 318.15) K, and PEG 1500 + sodium citrate, from (278.15 to 298.15) K. Therise 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 bettercapability to induce phase separation, when compared to potassium phosphate.

【 授权许可】

CC BY