Complexation of Plutonium and Other Actinides in Different Oxidation States with Gluconate at Low pH Values─A CE-ICP-MS Study.

ABSTRACT: Using a coupling between capillary electrophoresis and ICP-MS (CE-ICP-MS), the gluconate (GLU) complexation of plutonium in the major oxidation states (III)-(VI) as well as Am(III), Th(IV), Np(V), and U(VI) was investigated at pH ≤ 4. CE-ICP-MS enabled the determination of the Pu oxidation state by comparing its electrophoretic mobility to that of a redox-analogous actinide (An). For the Am(III)/Pu(III) pair, the complex formation constants of three successive binary [An(GLU)_x]^3-x (x = 1-3) complexes could be determined. For Np(V)/Pu(V), the complex formation constants of the first binary [AnO₂(GLU)]_(aq) complex were determined in accordance with previous literature for Np(V), and those of the second [AnO₂(GLU)

SUBMITTER: Lohmann J 

PROVIDER: S-EPMC12933882 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature