中文摘要：

用二-2-乙基己基磷酸（HDEHP）和P2O5混合物做萃取剂^241 Am^3＋为示踪剂，做了从硝酸溶液中液-液萃取Am的实验研究。完成了硝酸浓度和震荡时间的变化影响^241 Am^3＋萃取效率的条件实验。发现P20，的浓度≥0．0125mol／L时，^241 Am^3＋ 的萃取效率大干98％；震荡时间≥30s，两相便可达到萃取平衡。分别用二乙撑三胺五乙酸（DTPA）-乳酸以及N％CO3溶液对^241 Am^3＋进行反萃取。结果显示N％CO，溶液能给出很高的反萃效率。而且，在很短的震荡时间内，两相都能达到反萃平衡。

英文摘要：

The solvent extraction of ^241Am^3 ＋ from HNO3 solution has been completed by using a mixture of di-2- ethyl hexyl orthophosphpric aicd （HDEHP） and P2O5 as an extractant and ^241 Am^3＋ as tracer. The condition experiments effecting of nitric acid concentration and period of equilibration on Am percent extractions were made. It has been found when the concentration of P2O5 is ≥0.0125 mol/L, the percent extraction of ^241Am^3＋ is higher 98% and the equilibrium of the two phases can be achieved within the period of equilibration shorter than 30 s. ^241 Am^3 ＋ was reextracted from the organic phases with diethylenetriamine pentacetic acid （DTPA） and lactic acid as well as Na2CO3 solutions, respectively. The results showed that quite high stripping efficiency for ^241Am^3 ＋ can be given in Na2CO3 solutions. Moreover, the equilibrium of the two phases can be achieved within very short equilibrium time using the two kinds of stripping solutions.