氧化钕中杂质氧化镍含量的测定及测量结果的不确定度分析

采用电感耦合等离子体发射光谱法(ICP-OES)法测定氧化钕中杂质氧化镍的含量，得到氧化镍含量为0.002 7%,分析了检测过程中的各个影响因素，并对测量结果的可靠性以相对扩展不确定度表示(U_rel=12%,k=2)。相对不确定度分量计算结果表明，标准曲线拟合时引入的相对不确定度分量最大，u_rel(c₂)=5.639%,其次为标准溶液配制过程中引入的相对不确定度分量u_rel(c₁)=0.879%。本文可为相关检测人员的结果不确定度分析提供参考。

Determination of nickel oxide content in neodymium oxide and its uncertainty analysis

The content of nickel oxide in neodymium oxide was determined by ICP-OES method. The content of nickel oxide was 0.002 7%. Various influencing factors in the detection process were analyzed. The reliability of the measurement results was expressed by relative expansion uncertainty (U_rel=12%, k=2). The calculation of re-lative uncertainty component shows that the relative uncertainty component introduced by standard curve fitting is the largest, u_rel(c₂)=5.639%, followed by the relative uncertainty component introduced by the preparation of standard solution, u_rel(c₁)=0.879%. This paper can provide a reference of the result uncertainty analysis for relevant testing personnel.