以二（2-乙基己基）磷酸为萃取剂，分别以正庚烷、正辛烷、磺化煤油为稀释剂，研究了中性条件下亮氨酸的萃取平衡，获得三种体系的萃取平衡常数和亮氨酸稀溶液的萃取平衡数据，并获得了部分亮氨酸萃取热力学数据.结果表明，1个亮氨酸分子与2个二（2-乙基己基）磷酸二聚体结合，在本实验研究体系范围内，稀释剂不影响萃取平衡.
The extraction equilibrium of leucine with di-(2-ethylhexyl)phosphoric acid (D2EHPA) dissolved in n-heptane, n-octane and kerosene respectively was studied in neutral condition. The values of extraction equilibrium constant Kex and other thermodynamical data were obtained. The results show that one leucine molecule is extracted by complexing with two dimeric D2EHPA molecules, and the solvents do not affect the equilibrium in the conditions of the experiments.
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