金属钕及氧化钕中稀土杂质光谱测定

Spectrographic Determination of Rare Earth Elements in Neodymium and Neodymium Oxide

在色散 0 2 5nm/mm光栅光谱仪上 ,以控制气氛直流电弧粉末法测定了金属钕及氧化钕中氧化镧、氧化铈、氧化镨、氧化钐、氧化钆、氧化镝和氧化钇。采用正交设计实验 ,确定了测定条件。测定的下限对氧化铈、氧化镨为 0 0 5 % ,氧化镧、氧化钐、氧化钆、氧化镝和氧化钇为 0 0 3% ,相对标准偏差为 6 %～ 18%。

A DC method was used to determine La 2O 3, CeO 2, Pr 6O 11 , Sm 2O 3, Gd 2O 3, Dy 2O 3, Dy 2O 3, Y 2O 3 in Nd and Nd 2O 3 with oxygen argon controlled atmosphere on spectrograph reverse line dispersion 0 25 nm/mm. The calibration curve was ploted. The lower limits of detection are as follows: 0.05% for CeO 2 and Pr 6O 11 ; 0.03% for La 2O 3, Sm 2O 3, Gd 2O 3, Dy 2O 3 and Y 2O 3. The relative standard deviations are from 6% to 18%.