Li Hui-zhi, Zhou Chang-li, Luo Chuan-nan
Department of Applied Chemistry, Jinan University, Jinan 250022, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Oct;22(5):843-4.
This paper describes the determination of trace Nb and Ta in sample using carbon powder and hafnium oxide as buffer by atomic emission spectrometry (AES). Hafnium has been selected as internal standard, since it has scinilar evaporation curve as those of Nb and Ta. Samples can be analyzed without chemical pretreatment. The sample was directly loaded onto the ordinary electrode. The method is simple, rapid and accurate. The range of determination for Nb and Ta are 0%-0.25% and 0%-0.125% respectively, and the detection limits are found to be 0.003% and 0.001%, respectively. Satisfactory results are obtained.
本文介绍了采用碳粉和氧化铪作为缓冲剂，通过原子发射光谱法（AES）测定样品中痕量铌和钽的方法。选择铪作为内标，因为它具有与铌和钽相似的蒸发曲线。样品无需化学预处理即可进行分析。将样品直接加载到普通电极上。该方法简单、快速且准确。铌和钽的测定范围分别为0% - 0.25%和0% - 0.125%，检测限分别为0.003%和0.001%。获得了满意的结果。
