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Report No.
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Solvent extraction of Mo and W for redox studies of Sg

Miyashita, Sunao; Toyoshima, Atsushi; Oe, Kazuhiro; Asai, Masato  ; Sato, Tetsuya   ; Kitatsuji, Yoshihiro  ; Tsukada, Kazuaki  ; Nagame, Yuichiro ; Sch$"a$del, M.; Omtvedt, J. P.*; Kratz, J. V.*; Haba, Hiromitsu*; Kasamatsu, Yoshitaka*; Shinohara, Atsushi*; Akiyama, Kazuhiko*; Oura, Yasuji*; Yokoyama, Akihiko*; Sueki, Keisuke*

For determination of the redox potentials of seaborgium (Sg), we plan to carry out rapid continuous experiments using a new system combined with a flow electrolytic column and the rapid liquid-liquid extraction apparatus SISAK. For the experiments of redox potentials of Sg, fast separation between different oxidation states of Sg is required. In this study, solvent extraction of W and Mo, as the lighter homologues of Sg, from 0.10 mol/L hydrochloric acid solution into di-(2-ethylhexyl)phosphoric acid (HDEHP), 1-phenyl-3-metyl-4-benzoyl-5-pyrazolone (PMBP) and 3-isopropyl-tropolone (HT) in toluene was investigated. A synergistic effect by tributylphosphate (TBP) was also examined.

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