Flotation-spectrohotometric determination of germanium with phenylfluorone in coal fly ash.

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  • SHIDA Junichi
    Department of Applied Chemistry, Faculty of Engineering, Yamagata University
  • TAKAHASHI Yoshiko
    Department of Applied Chemistry, Faculty of Engineering, Yamagata University
  • OJIMA Koichi
    Department of Applied Chemistry, Faculty of Engineering, Yamagata University
  • MATSUO Tsutomu
    Department of Applied Chemistry, Faculty of Engineering, Yamagata University

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  • Flotation-Spectrophotometric Determination of Germanium with Phenylfluorone in Coal Ash
  • Flotation Spectrophotometric Determinat

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Description

A precise and accurate method based on the flotation-spectrophotometry has been developed for the microdetermination of germanium in coal fly ash. The germanium-phenylfluorone complex was floated with cyclohexane at the phase boundary and separated from the excess reagent by removing the aqueous phase. Cyclohexane was a suitable extractant for the separation of germanium tetrachloride from foreign ions. Extractability of germanium was 90.3 ± 0.5 %. Coal fly ash was treated with aqua regia and hydrofluoric acid in a teflon decomposition vessel, and germanium was determined as phenylfluorone complex in a cyclohexane-ethanol medium at 505 nm. The absorbance of the reagent blank was 0.010 ± 0.002. The accuracy of the proposed method was studied by analyzing synthetic samples and NBS 1633 coal fly ash.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 33 (5), E143-E149, 1984

    The Japan Society for Analytical Chemistry

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