Abstract
A fast analytical method for the determination of niobium and tantalum in ores and special alloys by inductively coupled plasma atomic emission spectrometry has been developed. Optimum conditions for the determination of both metals in the plasma were worked out and possible interferences were studied before attempting the determination in the real samples. Ores are dissolved in a mixture of HCl, HF and H3PO4 acids while for the special alloy a HCl+H2O2 mixture is used. The resulting solutions are diluted to the mark with tartaric acid before their final direct nebulization into the plasma. Other elements present did not interfere in the determination of Nb or Ta at concentration levels similar to those found in the analyzed samples. The results obtained determining niobium and tantalum in pyrochlore and special alloys by the proposed procedure are in good agreement with the certified values.
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Sanchez Uria, J.E., Ortiz, C.G., Menendez Garcia, A. et al. Determination of niobium and tantalum in some ores and special alloys by inductively coupled plasma atomic emission spectrometry. Mikrochim Acta 92, 195–202 (1987). https://doi.org/10.1007/BF01201839
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DOI: https://doi.org/10.1007/BF01201839