title: Investigation of the interaction between 1-hydroxyethane-1,1'-diphosphonic acid (HEDP) and uranium(VI).
abstract: A detailed study, using a panel of spectroscopic analytical methods, of the complexation between 1-hydroxyethane-1,1'-diphosphonic acid (HEDP) and uranyl ion (UO(2)(2+)) is reported. Results suggest that the metal complex is present as only 1:1 (metal/ligand) species at low concentration (<10(-)(4) M). The conditional constants of this complex were determined at various pH using time-resolved laser-induced fluorescence (TRLIF) and electrospray ionization mass spectrometry (ESI-MS). Further investigations indicate the presence of a 1:2 (metal/ligand) complex at higher concentrations ( approximately 10(-)(2) M). Selectivity studies as well as structural aspects are presented.
authors.affiliation: CEA-Saclay, DEN/DPC/SECR/LSRM, 91191 Gif-sur-Yvette Cedex, France. jacopin@carnac.cea.fr
authors.forename: Christophe
authors.initials: C
authors.lastname: Jacopin
authors.forename: Marcin
authors.initials: M
authors.lastname: Sawicki
authors.forename: Gabriel
authors.initials: G
authors.lastname: Plancque
authors.forename: Denis
authors.initials: D
authors.lastname: Doizi
authors.forename: Frédéric
authors.initials: F
authors.lastname: Taran
authors.forename: Eric
authors.initials: E
authors.lastname: Ansoborlo
authors.forename: Badia
authors.initials: B
authors.lastname: Amekraz
authors.forename: Christophe
authors.initials: C
authors.lastname: Moulin