Extraction behavior of rutherfordium into tributylphosphate from hydrochloric acid

H. Haba, K. Tsukada, M. Asai, A. Toyoshima, Y. Ishii, H. Toume, T. Sato, I. Nishinaka, T. Ichikawa, S. Ichikawa, Y. Nagame, W. Sato, K. Matsuo, Y. Kitamoto, Y. Tashiro, A. Shinohara, J. Saito, M. Ito, T. Ikezawa, M. SakamakiS. Goto, H. Kudo, H. Kikunaga, M. Arai, S. Kamataki, A. Yokoyama, K. Akiyama, K. Sueki, Y. Oura, M. Schädel, W. Brüchle, J. V. Kratz

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20 Citations (Scopus)


The extraction behavior of rutherfordium (Rf) into tributylphosphate (TBP) from hydrochloric acid (HCl) has been studied together with those of the lighter group-4 elements Zr and Hf. The extractability of 261Rf, 169Hf, and 85Zr into TBP was investigated under identical conditions in 7.2-8.0 M HCl by on-line reversed-phase extraction chromatography. The percent extractions of Rf, Hf, and Zr into the TBP resin increase steeply with increasing HCl concentration, and the order of extraction is Zr > Hf ≈ Rf. By considering the order of chloride complexation among these elements, it is suggested that the stability of the TBP complex of Rf tetrachloride is lower than those of Zr and Hf.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalRadiochimica Acta
Issue number1
Publication statusPublished - 2007
Externally publishedYes


  • Hafnium (Hf)
  • Hydrochloric acid (HCl)
  • Reversed-phase extraction chromatography
  • Rutherfordium (Rf)
  • Tributylphosphate (TBP)
  • Zirconium (Zr)

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry


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