ICP-AES法同时测定二氧化铀中痕量钾、钠  

Determination of trace potassium and sodium in uranium dioxide by ICP-AES

作　　者：李洪 杨箭 陈颖 刘栋 江志文 

机构地区：[1]中核272铀业有限责任公司,湖南衡阳421004

出　　处：《铀矿冶》2014年第4期223-226,共4页Uranium Mining and Metallurgy

摘　　要：采用TBP萃淋树脂,在酸性介质中使铀与待测元素定量分离,用ICP-AES法同时测定二氧化铀中钾、钠的含量.当试样平行测定6次时,钾、钠测定结果相对标准偏差分别为5.8％和6.4％,加标回收率分别为93.5％～104.3％和92.3％～102.8％.称样质量为0.5g时,方法的测定下限钾、钠分别为0.11×10-6和0.07×10-6.该方法满足二氧化铀中痕量钾、钠的分析要求.In acid medium uranium is separated from impurities by TBP Eluex resin, and potassium and sodium in uranium dioxide were determined simultaneously by ICP-AES method. When the sam- ple is measured 6 times in parallel, the measurement result of relative standard deviations is 5.8 % for potassium, and 6.4% for sodium as well as recovery is 93.5% -107.0% for potassium, and 91.5- 102.8% for sodium. If sample mass is 0.5 g, and 0.07 × 10-6 for sodium respectively. The potassium and sodium in uranium dioxide. lower limit of the method is 0.11 × 10-6 for potassium method can meet requirements of determination of trace

关 键 词：二氧化铀 钾 钠 ICP-AES TBP萃淋树脂 

分 类 号：TL271.4[核科学技术—核燃料循环与材料]