电感耦合等离子体发射光谱法测定钕铁硼合金中钕含量的不确定度评定  

Uncertainty evaluation of determination of neodymium content in NdFeB alloy by inductively coupled plasma atomic emission spectrometry

作　　者：冯泉妤 刘友好 陈静武 衣晓飞 Feng Quanyu;Liu Youhao;Chen Jingwu;Yi Xiaofei(Earth-Panda Advance Magnetic Material Co.,Ltd,State Key Laboratory of Rare Earth Permanent Magnetic Materials,Hefei 231500,China)

机构地区：[1]安徽大地熊新材料股份有限公司,稀土永磁材料国家重点实验室,合肥231500

出　　处：《化学分析计量》2021年第9期85-88,共4页Chemical Analysis And Meterage

基　　金：安徽省科技计划项目(201903a07020002)。

摘　　要：建立了钕含量计算的数学模型,对电感耦合等离子体发射光谱法测定钕铁硼合金中钕含量的测定结果不确定度进行评定。对测量过程进行分析,确定了不确定度的来源主要包括分析过程中所用的电子天平、玻璃器皿、校准曲线、标准溶液、试液定容体积及测量重复性等引入的不确定度分量。逐个量化每个测量不确定度分量,得到测定结果的合成标准不确定度和扩展不确定度。当测量钕含量为21.41%的钕铁硼合金样品时,扩展不确定度为0.33%(k=2)。对此测定方法的可行性和准确性进行了科学的分析判断,从而提高样品检测的准确度。A mathematical model for the calculation of neodymium content was established,and the uncertainty of the determination result of neodymium content in NdFeB alloy by inductively coupled plasma atomic emission spectrometry was evaluated.The measurement process was analyzed and the sources of uncertainty were determined,mainly including the uncertainty components introduced by electronic balance,glassware,calibration curve,standard solution,constant volume of test solution and measurement repeatability.Each measurement uncertainty component was quantified one by one to obtain the combined standard uncertainty and extended uncertainty of the measurement results.When content of neodymium in NdFeB alloy sample was 21.41%,the expanded uncertainty was 0.33%(k=2).The feasibility and accuracy of the method were analyzed and judged scientifically,so as to improve the accuracy of sample detection.

关 键 词：不确定度评定 电感耦合等离子体发射光谱法 钕铁硼合金 钕 

分 类 号：O657.31[理学—分析化学]