Extraction spectrophotometric determination of niobium in rocks with sulfochlorophenol S |
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| Authors: | A.E. Childress L.P. Greenland |
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| Affiliation: | U.S. Geological Survey, Reston, Va. 22092 U.S.A. |
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| Abstract: | After acid decomposition and potassium pyrosulfate fusion, niobium (1—26 ppm) is separated from interfering elements by extraction into methyl isobutyl ketone from 6 M H2SO4—2 M HF and back-extracted into water. The niobium—sulfochloro-phenol S complex is extracted into amyl alcohol. |
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