Determination of niobium, tantalum, zirconium, and hafnium by atomic emission spectrometry using directed thermochemical reactions |
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| Authors: | M T Gazieva E A Pometun D N Pachadzhanov |
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| Institution: | (1) Division of Pharmaceutical and Toxicological Chemistry, Tajik Abuali Ibnsino State Medical University, pr. Rudaki 130, Dushanbe, 743003, Tajikistan;(2) Division of Analytical Chemistry, Tajik State National University, pr. Rudaki 17, Dushanbe, 734025, Tajikistan;(3) Institute of Chemistry, Academy of Sciences of Tadjikistan, ul. Aini 299/2, Dushanbe, 734063, Tajikistan |
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| Abstract: | A method is proposed for determining niobium, tantalum, zirconium, and hafnium in mineral stocks. It is based on the preliminary synthesis of analyte complexes in hydrofluoric acid containing cadmium oxide. It was shown by spectrographic measurements that the decomposition products of complexes in a small chamber electrode of an ac carbon arc are volatile individual analyte fluorides. |
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