ICP-MS法测定铀化合物中的5个杂质元素

Determination of five impurity elements in uranium compound by Inductively Coupled Plasma Mass Spectrometry

建立了电感耦合等离子体质谱法(ICP-MS)测定铀化合物中的锰、镍、铜、铝和镁等5个杂质元素的方法。将样品和铀化合物标准物质消解后,通过配置一系列不同铀含量的工作曲线,将标准溶液和样品中铀含量控制在相同水平,采用基体匹配法测量各杂质元素的含量。该方法的检出限为0.008 ng·mL^-1~0.038 ng·mL^-1。通过实验可知溶液中铀浓度控制在100μg·mL^-1以下时,铀标准物质可以得到准确的结果。通过此方法测量了比对样品中锰、镍、铜、铝和镁的结果,含量范围为2.11μg·g^-1~84μg·g^-1 U。

A method for the determination of Mn,Ni,Cu,Al,Mg in uranium compound by Inductively Coupled Plasma Mass Spectrometry was presented and described.The sample and Certified Reference Material were diluted at the same factor so as to control the matrix of uranium.The detection limit of the method is 0.008 ng·mL^-1 to 0.038 ng·mL^-1.Results indicate that the concentration of the Mn,Ni,Cu,Al,Mg agree with certificated values with the uranium matrix-matched standards under 100μg·mL^-1.The contrastive test sample results of Mn,Ni,Cu,Al,Mg were 2.11μg·g^-1 to 84μg·g^-1 U,the comparison report shows that this method can acquire good result of impurities in uranium compounds.