电感耦合等离子体光谱快速自动曲线校正技术测定铀钆氧化物中5种金属杂质  

Determination of 5 metal impurities in uranium gadolinium oxide by inductively coupled plasma spectroscopy with rapid automatic curve correction technology

作　　者：陈雪旭 陈岚 CHEN Xuexu;CHEN Lan(CNNC Jianzhong Nuclear Fuel Co.,Ltd.,YiBin,644000,China)

机构地区：[1]中核建中核燃料元件有限公司,四川宜宾644000

出　　处：《化学分析计量》2024年第8期62-68,共7页Chemical Analysis And Meterage

摘　　要：建立电感耦合等离子体发射光谱快速自动曲线校正技术(FACT)测定铀钆氧化物中微量金属杂质元素的分析方法。通过对分析物谱线、干扰物谱线以及空白谱线的分析,选择元素最佳分析线,利用谱线校正扣减干扰物谱线,实现在高含量钆基体条件下对目标元素分析线进行干扰校正,准确测定元素含量。样品用硝酸溶解后,以磷酸三丁酯萃淋树脂作为固定相,3 mol/L硝酸溶液为流动相将铀分离。采用标准曲线法,利用FACT模型校正钆基体干扰,准确测量溶液中目标元素的含量。对FACT模型的有效性进行了考察和验证,确定目标元素的测量范围,元素加标回收率为84%~109%,测定结果的相对标准偏差为0.56%~7.07%(n=6)。该方法可用于含钆铀氧化物中微量金属杂质的检测。A method for determination of 5 metal impurities in uranium gadolinium oxide by inductively coupled plasma spectroscopy(ICP-AES)with rapid automatic curve correction technology(FACT)was established.By analyzing the spectral lines of the analyte,interferent,and blank,the optimal analysis line of the element was selected.Spectral line correction was used to subtract interferent spectral lines,achieving interference correction of the target element analysis line under high gadolinium matrix conditions and accurately determining the element content.After dissolving the sample in nitric acid,uranium was separated using tributyl phosphate extraction resin(CL-TBP)as the stationary phase and a 3 mol/L nitric acid solution as the mobile phase.The standard curve method was adopted,and the FACT model was used to correct the interference of gadolinium matrix,accurately measuring the content of target elements in the solution.The effectiveness of the FACT model was investigated and validated,and the measurement range of the target element was determined.The recoveries of element spiked were 84%-109%,and the relative standard deviations of the measurement results were 0.56%-7.07%(n=6).This method can be used for the detection of trace metal impurities in gadolinium containing uranium oxides.

关 键 词：自动曲线校正技术 铀钆氧化物 金属杂质 

分 类 号：O657.3[理学—分析化学]