ICP–OES法测定八氧化三铀中杂质元素钨  

Determination of Tungsten in U_3O_8 by ICP–OES

作　　者：杜桂荣[1] 牛洁[1] 刘扬[1] 王春叶[1] 

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《化学分析计量》2014年第1期42-44,共3页Chemical Analysis And Meterage

基　　金：国防科技工业技术基础科研项目

摘　　要：以ICP-OES法测定八氧化三铀中杂质元素钨。采用浓HNO3-浓HCl、浓HNO-HF、3 mol/L HNO3三步酸溶方案，利用CL-TBP萃淋树脂将铀基体分离，淋洗液基质为3 mol/L HNO3，淋洗液流速为1 mL/min。弃去最初2 mL死体积淋洗液后接收10 mL，分离回收率平均值为95.93%，线性方程为y=539.71x＋16.6，相关系数r2=0.9997，4水平样品测定结果的相对标准偏差为0.39％～3.12％（n=6）。用该方法对标准物质进行测定，测定结果在参考值范围内。Tungsten in U3O8 was determined by ICP-OES method. Sample was prepared with HNO3-HCl, HNO3-HF, 3 mol/L HNO3 in proper order, U was separated by CL-TBP with 3 mol/L HNO3, the flow velocity was 1 mL/min. 10 mL filter solution was received after 2 mL dead filter was discarded, the recovery ratio was 95.93%, the work-curve lin-ear equation was y=539.71x＋16.6 with the correlative coefficient （r2） of 0.999 7. 4 level samples were determined and the relative standard deviation was 0.39%-3.12%（n=6）. Reference material was determined by the method and the determina-tion results were in the reference range.

关 键 词：ICP-OES法 八氧化三铀 钨 U3O8 

分 类 号：O657.3[理学—分析化学]