吸收光谱法测定六价铀时5种杂质金属离子的干扰及消除  

Interference and elimination of five impurity metal ions in the determination of U(Ⅵ)by absorption spectrometry

作　　者：王玲[1] 钱红娟[1] 张丽华[1] 刘焕良[1] WANG Ling;QIAN Hongjuan;ZHANG Lihua;LIU Huanliang(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《化学分析计量》2023年第3期75-78,83,共5页Chemical Analysis And Meterage

摘　　要：研究了5种杂质离子对六价铀测定的干扰情况和干扰消除方法,将偏最小二乘法与可见吸收光谱相结合,优化建模参数,建立了包含杂质离子信息的六价铀数学分析模型,利用模型分析样品可有效消除这些杂质离子对测定的干扰,使测定结果相对偏差低于10%,该方法可应用于实际料液中六价铀含量的准确测量。The interference of these five impurity ions on the determination of U(Ⅵ)and the interference elimination method were studied.By means of combining the partial least square method with the visible absorption spectrum,optimizing the modeling parameters,a mathematical model of U(Ⅵ)containing information of impurity ions was established.The interference of impurity ions was effectively eliminated by using this model to analysis samples.The relative deviation of the results could be reduced to less than 10%.This method can be applied to the accurate measurement of U(Ⅵ)in reprocessing feed solution.

关 键 词：六价铀 杂质离子 偏最小二乘法 可见吸收光谱法 

分 类 号：O657.3[理学—分析化学]