应用气浮络合萃取技术（FCE），实现了水溶液中微量L-色氨酸的分离富集。对气浮络合萃取工艺进行了研究，并对L-色氨酸气浮络合萃取的动力学以及机制进行了探讨。结果表明，与传统的络合萃取技术相比，气浮络合萃取在萃取效率和有机溶剂用量上都有明显的优势；在常温、L-色氨酸水溶液300mL、质量浓度为20mg/L、初始 pH 6.0、浮选溶剂为P204-正己烷溶液（P204体积分数为80%）10.00mL、NaCl摩尔浓度 0.20mol/L、通N2流速40mL/min 的条件下，气浮络合萃取分离水溶液中L-色氨酸的分配系数可达80；L-色氨酸的气浮络合萃取过程符合2.5级动力学，且主要受L-色氨酸与P204之间的络合反应控制。

Flotation complexation extraction (FCE) has been successfully employed to separa
te and concentrate trace amounts of Ltryptophane from aqueous solution and
the kinetics and mechanism of the separation process have been investigated. Th
e principles of the FCE technique have also been studied. Compared to traditiona
l complexation extraction (CE), FCE is significantly better in terms of both sep
aration efficiency and volume of organic solvent required. For separation at room temperature, using 300mL of 20mg/L L-tryptophane aqueous solution, with an initial pH of 6.0, 10.00mL of n-hexane solution containing bis (2-ethylhexyl) phosphate (P204) (φ (P204)=80%), NaCl with a concentration of 0.20mol/L and a nitrogen flow rate of 40mL/min, the distribution ratio of L-tryptophane with FCE aqueous solution can reach as high as 80. The investigation of FCE kinetics indicated that the FCE separation process for L-tryptophane had order 2.5, and is mainly controlled by the complexation reaction between L-tryptophane and P204.