Review

  • Journal of Nuclear Fuel Cycle and Waste Technology
  • Volume 4(1); 2006
  • Article

Journal of Nuclear Fuel Cycle and Waste Technology 2006;4(1):1-7. Published online: Mar, 30, 2006

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Determination of Pu Oxidation states in the HCl Media Using with UV-Visible Absorption Spectroscopic Techniques

  • Myung Ho Lee ; Mu Yeol Suh ; Kyoung Kyun Park ; Yeong Jae Park ; Won Ho Kim
Abstract

The spectroscopic characteristics of Pu (III, IV, V, VI) in the HCl media were investigated by measuring Pu oxidation states using a UV-Vis-NIR spectrophotometer (400-1200 ) after adjusting Pu oxidation states with oxidation/reduction reagents. Pu in stock solution was reduced to Pu(III) with NH2OH HCl, and oxidized to Pu(IV) and Pu(VI) with NaNO2 and HClO4, respectively. Also, Pu(V) was adjusted in the Pu(VI) solution with NH2OH HCl. The major absorption peaks of Pu(IV) and Pu(III) were measured in the 470 and 600 , respectively. The major absorption peaks of Pu (VI) and Pu(V) were measured in the 830 and 1135 , respectively. There was not foundto be significant changes of UV-Vis absorption spectra for Pu(III), Pu(IV) and Pu(VI) with aging time, except that an unstable Pu(V) immediately reduced to Pu(III).

Keywords

Pu oxidation state,absorption spectrum,spectroscopic characteristics