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.

• 本法采用25%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。