摘要
为建立快速、可靠的环境样品中超铀元素的分析方法，对UTEVA萃取色层树脂分离超铀元素的性能进行了研究。通过改变氧化还原条件、淋洗剂种类和浓度来探索UTEVA萃取色层树脂分离Am、Pu、Np和U的实验条件及分离效果，确定了以3mol／LHNO3、1mol／LHNO3-0．1mol／L抗坏血酸、2mol／LHCl—0．1mol／L草酸、0．01mol／LHNO3分别作为UTEVA树脂上Am、Pu、Np和u的淋洗剂，获得Am、Pu、Np和U的回收率分别为（93±1）％、（68±2）％、（44±3）％和（70±5）％（n=6），各核素间的去污因子为1×10^2～5×10^5。结果表明，用单个UTEVA萃取色层柱能够将Am、Pu、Np和U分离，并将此方法成功用于环境样品中Am、Pu、Np和U的分离。
In order to develop a fast and reliable procedure for analysis of transuranium elements in environmental samples, the performance of UTEVA extraction chromatography in separation of transuranium elements is studied. The separation experiment parameters are optimized in terms of the conditions for Pu and Np oxidation state adjustment and control, and the eluent composition and concentration for each of these four elements. The separation efficacy is evaluated. It is found that Am, Pu, Np, and U are effectively eluted from the column by 3 mol/L HNO3, 1 mol/L HNO3-0.1 mol/L ascorbic acid, 2 mol/L HC1-0.1 mol/L oxalic acid, and0.01 mol/L HNOa, respectively. The recoveries （93±1）%, （68±2）%, （44±3） % and （70± 5） % are respectively obtained （n = 6）. The mutual decontamination factors fall in the range 1 × 10^2-5 × 10^5. Our results demonstrate that the separation of Am, Pu, Np, and U with a single UTEVA extraction chromatographic column is achievable. The method has been successfully applied to separation of these elements in environmental samples
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2010年第1期22-26,共5页
Journal of Nuclear and Radiochemistry
关键词
萃取色层分离
UTEVA
超铀元素
chromatographic separation
UTEVA
transuranium elements
