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应用237-季铵萃取树脂色谱分离技术,将核电用二氧化铀中铀与待测杂质元素在6.5mol/LHNO_3介质中定量分离后,用975型ICP直读光谱仪同时测定Al,Ba,Be,Ca,Cd,Co,Cr,Cu,Fe,Mg,Mn,Mo,Nb,Ni,Pb,Ru,Sb,Sn,Ta,Ti,V,Zn和Zr等23种杂质。取样300mg时,测定下限为0.003×10~(-6)～0.25×10~(-6);方法的加入回收率在95％～109％范围内,相对标准偏差小于10％。
Using 237-quaternary ammonium extraction resin chromatographic separation technology, the uranium dioxide in uranium dioxide for nuclear power and the impurity element to be tested were quantitatively separated in a 6.5 mol / L HNO3 medium, and the contents of Al, Ba, Be, 23 kinds of impurities such as Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Mo, Nb, Ni, Pb, Ru, Sb, Sn, Ta, Ti, V, Zn and Zr. The lower limit of determination was 0.003 × 10 -6 ~ 0.25 × 10 -6 when the sample was taken at 300 mg. The recovery of the method was in the range of 95% -109% with the relative standard deviation less than 10%.