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Direct determination of plutonium(V) and neptunium(V) complexation by carbonate ligand with CE‐ICP‐sector field MS
Author(s) -
Topin Sylvain,
Aupiais Jean,
Moisy Philippe
Publication year - 2009
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200800656
Subject(s) - neptunium , plutonium , chemistry , carbonate , inductively coupled plasma mass spectrometry , radiochemistry , actinide , nuclear chemistry , environmental chemistry , inorganic chemistry , mass spectrometry , chromatography , organic chemistry
Direct determination of the stability constants of some pentavalent actinides (Np and Pu) with carbonate ligands was investigated by CE‐ICP‐sector field MS (SFMS). The high sensitivity of ICP‐SFMS coupled with the high separation power of CE makes it possible to determine the mobility of each species as well as the stability constants with good accuracy. A procedure for preparing pentavalent plutonium at trace level has been successfully tested enabling the study of Pu(V) complexation by CE‐ICP‐SFMS. Stability constants β1, β 2 and β 3 have been obtained at 25±1°C at a constant ionic strength of 0.37 M in NaClO 4 for K 1 and NaCl for β 2 and β 3 . The results were extrapolated to zero ionic strength and compared with data available in the literature for Np(V). The following stability constants were obtained for a Pu(V)/CO 3 system:$$log {\beta}_1^0 = 4.95 \pm 0.10, log {\beta}_2^0 = 6.34 \pm 0.10 , and \, log {\beta}_3^0 = 5.61 \pm 0.16.$$