为了解决国家标准方法不能同时测定钬铁合金样品中的稀土元素和其他元素的问题,提出了题示研究。取0.100 0 g钬铁合金样品至150 mL烧杯中,加入10 mL水、10 mL盐酸,于300 ℃加热至样品溶解完全,冷却后,用水定容至100 mL,采用电感耦合等离子体原子发射光谱法(ICP-AES)测定其中钆、铽、镝、铒、钇、镧、铈、镨、钕、钐、钙、镁、铝、锰、镍和钛等16种杂质元素的含量,并利用基体匹配法消除了合金材料中存在的大量钬和铁元素对待测元素的光谱干扰。结果表明,16种元素的质量浓度在一定范围内与对应的谱线强度呈线性关系,检出限(3s)为0.01~0.32 μg·L^-1。按照标准加入法进行回收试验,回收率为90.0%~115%,测定值的相对标准偏差(n=6)均小于7.0%。

In order to solve the problem about not being able to simultaneously determine rare earth elements and other elements in holmium-ferro alloy samples, the study mentioned by title was proposed. 0.100 0 g of holmium-ferro alloy sample was taken into a 150 mL-beaker, and 10 mL of water and 10 mL of hydrochloric acid were added. The mixture was heated at 300 ℃ until the sample was completely dissolved, and the solution was made its volume up to 100 mL after cooling. The 16 impurity elements including Gd, Tb, Dy, Er, Y, La, Ce, Pr, Nd, Sm, Ca, Mg, Al, Mn, Ni and Ti were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES), and the spectral interference of a large number of Ho and Fe elements in the alloy material to the elements to be tested was eliminated by the matrix matching method. As shown by the results, linear relationships between the corresponding spectral line intensity and mass concentration of 16 elements were found in definite ranges, with detection limits (3s) in the range of 0.01-0.32 μg·L^-1. Test for recovery was made by standard addition method, giving results in the range of 90.0%-115%, with RSDs (n=6) of the determined values less than 7.0%.