Voltammetric Study on Ion Transfer of Uranium(VI) Ion between Aqueous and Nitrobenzene Phases in the Presence of Bis(diphenylphosphoryl)methane.

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  • KITATSUJI Yoshihiro
    Advanced Science Research Center, Japan Atomic Energy Research Institute
  • AOYAGI Hisao
    Advanced Science Research Center, Japan Atomic Energy Research Institute
  • YOSHIDA Zenko
    Advanced Science Research Center, Japan Atomic Energy Research Institute
  • KIHARA Sorin
    Department of Chemistry, Kyoto Institute of Technology

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Other Title
  • Voltammetric Study on Ion-Transfer of Uranium(VI)Ion between Aqueous and Nitrobenzene Phase in the Presence of Bis(diphenylphosphoryl)methane
  • Voltammetric Study on Ion-Transfer of U

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Description

The ion transfer of UO22+ ion across an aqueous(w)/nitrobenzene(NB) interface was investigated by ion-transfer polarography using an aqueous electrolyte dropping electrode. It was found that the transfer of UO22+ from w to NB was facilitated by bis(diphenylphosphoryl)methane (BDPPM), and that the transfer reaction had irreversible characteristics. A potential generated at the UO22+ ion-selective electrode, which was prepared while referring to ion transfer data, revealed a reversible Nernstian response against the concentration of the UO22+ ion in an aqueous sample solution. The irreversible nature of the UO22+ transfer observed in the polarogram resulted from such slow processes involved in the ion transfer reaction as the adsorption/desorption of BDPPM or the UO22+-BDPPM complex at the w/NB interface. The feasibility of the electrolytic separation of uranium from neptunium and plutonium on the basis of a selective ion-transfer reaction is discussed.

Journal

  • Analytical Sciences

    Analytical Sciences 14 (1), 67-70, 1998

    The Japan Society for Analytical Chemistry

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