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Fast On-line Solvent Extraction with the SISAK-3 Centrifuge System as a Test of Chemical Studies of the Elements 105 and 106

The fast centrifuge system SISAK-3 has been applied to study in on-line experiments the chemical behavior of the homologs of Elements 105 and 106. Using 0.046 M trioctylamine dissolved in Shellsol T, the Group 5 homologs of Element 105 and the Group 6 homologs of Element 106 can be extracted from an unbuffered 1.0 M α-hydroxyisobutyric acid solution with yields between 60% and 100%. Group 4 homologs of Element 104 and the lanthanides remain in the aqueous phase. Similar results were observed using lactic acid solutions.