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Complexation of europium and uranium by humic acids analyzed by capillary electrophoresis‐inductively coupled plasma mass spectrometry
Author(s) -
Möser Christina,
Kautenburger Ralf,
Philipp Beck Horst
Publication year - 2012
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.201100652
Subject(s) - chemistry , uranium , inductively coupled plasma mass spectrometry , capillary electrophoresis , europium , mass spectrometry , chromatography , environmental chemistry , analytical chemistry (journal) , radiochemistry , materials science , ion , organic chemistry , metallurgy
Investigations of the mobility of radioactive and nonradioactive substances in the environment are important tasks for the development of a future disposal in deep geological formations. Dissolved organic matter ( DOM ) can play an important role in the mobilization of metal ions due to complexation. In this study, we investigate the complexation behavior of humic acid ( HA ) as a model substance for DOM and its influence on the migration of europium as homologue for the actinide americium and uranium as the principal component of nuclear fuel. As speciation technique, capillary electrophoresis ( CE ) was hyphenated with inductively coupled plasma mass spectrometry ( ICP ‐ MS ). For the study, 0.5 mg·L −1 of the metals and 25 mg·L −1 of (purified Aldrich) HA and an aqueous solution sodium‐perchlorate with an ionic strength of 10 mM at pH 5 were used. CE – ICP ‐ MS clearly shows the different speciation of the triple positively charged europium and the double positively charged uranyl cation with HA .