ICP－AES法测定四氟化铀标准物质中Cr、Fe、Mo、Ni和Ti  

DETERMINATION OF 5 TRACE ELEMENTS IN UF_4 CRMs BY ICP-AES

作　　者：刘虎生[1] 李军[1] 

机构地区：[1]核工业北京化工冶金研究院

出　　处：《铀矿冶》1996年第4期268-271,共4页Uranium Mining and Metallurgy

摘　　要：本法采用２５％（ＮＨ４）２ＣＯ３和Ｈ２Ｏ２溶解ＵＦ４，利用２３７－季铵萃淋树脂色谱分离技术，将ＵＦ４中铀与待测杂质元素在６．５ｍｏｌ·Ｌ（－１）ＨＮＯ３介质中定量分离后，及９７５型ＩＣＰ直读光谱仪同时测定ＵＦ４标准物质中Ｃｒ、Ｆｅ、Ｍｏ、Ｎｉ和Ｔｉ。取样３００ｍｇ时，分析结果均落在标准值的置信区间内，相对标准偏差＜１０％。测定下限为０．０４×１０－６～０．０７３×１０－６。The 237--quaternary ammonium levextrel resin chromatography was used to sepsrate 5 trace elements in UF. CRMs. The sample was dissolved in 25% (NH4)2CO3 and H2O2 solution, which was evaporated dry with NHO3. The residue was dissolved in 1mL 6. 5mol.L-1 HNO3, and the uranium was separated by chromatographic column. The 5 trace elements Cr,Fe,Mo,Ni and Ti contained in the eluant were determined with 975 type ICP direct reading spectrometer. For a sample of 300mg,the detection limits were 0. 04 ×10--6 to 0. 073 × 10-6,and RSD was <10%.

关 键 词：季胺萃淋树脂 杂质元素 四氟化铀 铬 铁 钼 

分 类 号：O614.62[理学—无机化学] TL271[理学—化学]