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研究了三烷基氧膦（ＴＲＰＯ）－二甲苯溶液从硝酸体系中萃取镅（Ⅲ）的性能及从有机相中反萃取镅（Ⅲ）的条件。同时也研究了ＴＲＰＯ－ＤＨＤＥＣＭＰ混合体系对镅（Ⅲ）的复合萃取效应。结果表明：ＴＲＰＯ在低酸度硝酸体系中是镅（Ⅲ）的良好萃取剂；在ｐＨ＝５．０的ＤＴＰＡ－乳酸介质中，镅（Ⅲ）可以被完全反萃到水相中；ＴＲＰＯ－ＤＨＤＥＣＭＰ混合溶液复会萃取镅（Ⅲ）时没有明显的协萃效应。
The performance of trialkylphosphine oxide (TRPO) -xylene solution extracted from nitric acid system and the conditions of stripping (Ⅲ) from the organic phase were studied. At the same time, the compound extraction effect of TR (Ⅲ) by TRPO-DHDECMP mixture system was also studied. The results showed that TRPO was a good extractant for 镅 (Ⅲ) in low acidity nitric acid system; 镅 (Ⅲ) could be completely stripped into the aqueous phase in DTPA-lactic acid solution at pH = 5.0; TRPO-DHDECMP There was no obvious synergistic effect when the mixed solution was recovered from 镅 (Ⅲ).