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We developed a new apparatus for the study of electrochemical properties of the heaviest elements. The apparatus is based on a flow electrolytic cell combined with column chromatography. Glassy-carbon fibers modified with Nafion perfluorinated cation-exchange resin are used as a working electrode as well as a cation-exchanger. The elution behavior of  139 Ce with the number of 10 10  atoms in 0.1 M ammonium α-hydroxyisobutyric acid solution from the column electrode was investigated at the applied potentials of 0.2–1.0 V versus the Ag/AgCl reference electrode in 1.0 M LiCl. It was found that  139 Ce 3+  is successfully oxidized to  139 Ce 4+  even with tracer concentration at around the redox potential determined by cyclic voltammetry for the macro amounts of Ce with 10 17  atoms (10 −3  M). The present oxidation reaction and separation of Ce 4+  was accomplished within a few minutes.

Development of an electrochemistry apparatus for the heaviest elements