北京大学学报(自然科学版)

牛血清白蛋白进入皂化二(2-乙基己基)磷酸酯微乳体系的研究

李彦,吴瑾光,徐光宪   

  1. 北京大学化学系,北京,100871
  • 收稿日期:1994-07-11 出版日期:1995-11-20 发布日期:1995-11-20

Solubilization of Bovin Serum Albumin(BSA) in Saponified P204 Microemulsion System

Li Yan, WU Jinguang, XU Guangxian   

  1. Department of Chemistry, Peking University, Beijing, 100871
  • Received:1994-07-11 Online:1995-11-20 Published:1995-11-20

摘要: 研究了影响牛血清白蛋白进入皂化二(2-乙基己基)磷酸酯(P204)所形成的微乳液水池的因素,发现当萃取剂皂化度为87%时对蛋白的溶解度最大;在所考察的范围内蛋白质的浓度一般无影响;对于盐效应来说,盐浓度增加对蛋白质进入微水池不利,影响程度按NaCl,KCl,CaCl2的顺序依次增加;对于水相介质条件,当水相pH值为4到7时蛋白质较易进入微乳状液。利用pH和离子强度对蛋白质进入有机相的影响,可以通过调节pH和离子强度来实现萃取和反萃。

关键词: 血清白蛋白, 微乳状液, 二(2-乙基己基)磷酸酯

Abstract: The injection method was used in this paper to investigate the solubilization of BSA in microemulsion of saponified bis(2-ethylhexyl)phosphate (P204). When the saponification ratio of P204is 87%, the volumefraction (φBSA) has the largest value. The concentration of BSA in aqueous phase has no obvious effect on φBSAwithin the range ofinves-tigation. However, the increase of the concentration of salts decreases the φ value, and when the salt is CaCl2, φBSAhas its largest decrease. The injection volume is relatively higher within the pH range of 4 to 7. These properties will be helpful in the separation and purification of BSA.

Key words: BSA, microemulsion, bis(2-ethylhexyl)phosphate

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