乳状液膜法分离二元氨基酸的研究

MUTUAL SEPARATION OF BINARY AMINO ACIDS WITH EMULSION LIQUID MEMBRANE TECHNIQUE

定义了乳状液膜法分离氨基酸的分离系数,并以苯丙氨酸(Phe)/天冬氨酸(Asp)作为研究对象,探讨了影响分离系数的主要因素。研究结果表明:用稳态条件下液膜体系中两种氨基酸的传质通量之比定义两种氨基酸的分离系数,能够较全面反映两种氨基酸及液膜体系所具有的特性以及影响分离系数的复杂因素,为改善分离效果提供理论指导。对于采用酸性萃取剂为载体的液膜体系来说,pH值是影响两种氨基酸分离系数的主要因素,而载体浓度对分离系数的影响程度相对较小。

Separation coefficient was defined to evaluate selectivity of an emulsion liquid membrane(ELM) system for binary amino acids. Important factors affecting ELM separation of phenylalanine(Phe) and asparatic acid(Asp) is the pH in the external aqueous phase while the carrier concentration is a less affecting factor for the separation coefficient.