Direct Spectrographic Determination of In, La, Nb and Sr in Thorium Oxide
作者:
R. Venkatasubramanian,
期刊:
Analytical Letters
(Taylor Available online 1979)
卷期:
Volume 12,
issue 3
页码: 289-302
ISSN:0003-2719
年代: 1979
DOI:10.1080/00032717908082532
出版商: Taylor & Francis Group
关键词: Emission Spectroscopy;Carrier-Distillation;Impurities in ThO2
数据来源: Taylor
摘要:
A d.c. are emission spectrographic method is described for the determination of ppm levels of In, La, Nb and Sr in thorium oxide. The method permits determination of the above low and high volatile impurity elements in thoria using AgCl as carrier in an atmosphere of oxygen. The carrier-distillation technique reported makes possible the following range of estimations: In : 1–50 ppm; La, Nb : 10–500 ppm and Sr: 2–100 ppm. The method is simple and rapid and its precision ranges from 14% for In to 18% for Nb. Observations made on the choice of carrier and internal standard are presented.
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