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Separation of tungsten from molybdenum by liquid-liquid extraction and extraction chromatography using thiocyanate and a quaternary ammonium salt

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Abstract

Methods were developed for the separation of tungsten from molybdenum by liquid-liquid extraction and extraction chromatography using thiocyanate and a quaternary ammonium salt, Zephiramine. Tungsten was extracted into chloroform as an ion associate of tungsten(V)-thiocyanate complex and Zephiramine cation was retained on a column of Teflon powder coated with Zephiramine, but molybdenum(III) was neither extracted nor retained. The extraction chromatographic method was successfully applied to the determination of trace amounts of tungsten in molybdenum by neutron activation analysis.

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Author notes

  1. H. Onishi

    Present address: Department of Chemistry, University of Tsukuba, Sakura-mura, 300-31, Ibaraki-ken, Japan

Authors and Affiliations

  1. Division of Chemistry, Japan Atomic Energy Research Institute, Tokai-mura, 319-11, Ibaraki-ken, (Japan)

    C. Yonezawa & H. Onishi

Authors
  1. C. Yonezawa
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  2. H. Onishi
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Yonezawa, C., Onishi, H. Separation of tungsten from molybdenum by liquid-liquid extraction and extraction chromatography using thiocyanate and a quaternary ammonium salt. J. Radioanal. Chem. 36, 133–144 (1977). https://doi.org/10.1007/BF02516261

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  • DOI: https://doi.org/10.1007/BF02516261

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