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〕本文叙述了ＣＬ－ＴＢＰ萃取色层分离，ＩＣＰ／ＭＳ测定Ｕ３Ｏ８ 中痕量杂质元素Ｚｒ、Ｎｂ、Ｔａ 和Ｒｕ 的方法。Ｕ３Ｏ８ 经硝酸及少许氢氟酸溶解后，用ＣＬ－ＴＢＰ萃淋树脂作固定相，硝酸与草酸的混合酸作流动相，进行萃取色层分离使被测杂质元素与铀基体分离，杂质元素淋洗液用ＩＣＰ／ＭＳ测定。取样量为０．５ｇ 时，杂质元素Ｚｒ、Ｎｂ、Ｔａ和Ｒｕ 的测定下限为１×１０－ ８ｇ／ｇ，方法的重加回收率在９３％ －１１２％ 之间，８ 次平行取样测量结果的相对标准偏差小于１７％ ，本方法应用于Ｕ３Ｏ８ 标准物质中Ｚｒ、Ｎｂ、Ｔａ和Ｒｕ 的测量，测量结果与定值数据吻合较好
This article describes the CL-TBP extraction chromatography, ICP / MS U3O8 trace elements trace elements Zr, Nb, Ta and Ru. After the U3O8 was dissolved in nitric acid and a little hydrofluoric acid, the mixed solution of nitric acid and oxalic acid was used as the mobile phase with the CL-TBP extraction resin as the stationary phase. The chromatographic separation was carried out to separate the impurity elements from the uranium matrix. Lotions were measured by ICP / MS. When the amount of sample is 0.5g, the lower limit of determination of impurity elements Zr, Nb, Ta and Ru is 1 × 10-8g / g, and the recoveries of the method are between 93% and 112%. The results of eight parallel sampling The relative standard deviation is less than 17%. This method is applied to the determination of Zr, Nb, Ta and Ru in U3O8 standard materials. The measured results agree well with the experimental data