title: Aqueous solutions of uranium(VI) as studied by time-resolved emission spectroscopy: a round-robin test.
abstract: Results of an inter-laboratory round-robin study of the application of time-resolved emission spectroscopy (TRES) to the speciation of uranium(VI) in aqueous media are presented. The round-robin study involved 13 independent laboratories, using various instrumentation and data analysis methods. Samples were prepared based on appropriate speciation diagrams and, in general, were found to be chemically stable for at least six months. Four different types of aqueous uranyl solutions were studied: (1) acidic medium where UO2(2+)aq is the single emitting species, (2) uranyl in the presence of fluoride ions, (3) uranyl in the presence of sulfate ions, and (4) uranyl in aqueous solutions at different pH, promoting the formation of hydrolyzed species. Results between the laboratories are compared in terms of the number of decay components, luminescence lifetimes, and spectral band positions. The successes and limitations of TRES in uranyl analysis and speciation in aqueous solutions are discussed.
authors.affiliation: Institut de Recherches Subatomiques, Chimie Nucléaire, CNRS/IN2P3 and University L. Pasteur, B. P. 28, 67037, Strasbourg Cedex 2, France. isabelle.billard@ires.in2p3.fr
authors.forename: Isabelle
authors.initials: I
authors.lastname: Billard
authors.forename: Eric
authors.initials: E
authors.lastname: Ansoborlo
authors.forename: Kathleen
authors.initials: K
authors.lastname: Apperson
authors.forename: Sylvie
authors.initials: S
authors.lastname: Arpigny
authors.forename: M Emilia
authors.initials: ME
authors.lastname: Azenha
authors.forename: David
authors.initials: D
authors.lastname: Birch
authors.forename: Pascal
authors.initials: P
authors.lastname: Bros
authors.forename: Hugh D
authors.initials: HD
authors.lastname: Burrows
authors.forename: Gregory
authors.initials: G
authors.lastname: Choppin
authors.forename: Laurent
authors.initials: L
authors.lastname: Couston
authors.forename: Veronique
authors.initials: V
authors.lastname: Dubois
authors.forename: Thomas
authors.initials: T
authors.lastname: Fanghänel
authors.forename: Gerhard
authors.initials: G
authors.lastname: Geipel
authors.forename: Solange
authors.initials: S
authors.lastname: Hubert
authors.forename: Jae I
authors.initials: JI
authors.lastname: Kim
authors.forename: Takaumi
authors.initials: T
authors.lastname: Kimura
authors.forename: Reinhardt
authors.initials: R
authors.lastname: Klenze
authors.forename: Andreas
authors.initials: A
authors.lastname: Kronenberg
authors.forename: Michael
authors.initials: M
authors.lastname: Kumke
authors.forename: Gerard
authors.initials: G
authors.lastname: Lagarde
authors.forename: Gerard
authors.initials: G
authors.lastname: Lamarque
authors.forename: Stefan
authors.initials: S
authors.lastname: Lis
authors.forename: Charles
authors.initials: C
authors.lastname: Madic
authors.forename: Gunther
authors.initials: G
authors.lastname: Meinrath
authors.forename: Christophe
authors.initials: C
authors.lastname: Moulin
authors.forename: Ryuji
authors.initials: R
authors.lastname: Nagaishi
authors.forename: David
authors.initials: D
authors.lastname: Parker
authors.forename: Gabriel
authors.initials: G
authors.lastname: Plancque
authors.forename: Franz
authors.initials: F
authors.lastname: Scherbaum
authors.forename: Eric
authors.initials: E
authors.lastname: Simoni
authors.forename: Sergei
authors.initials: S
authors.lastname: Sinkov
authors.forename: Carole
authors.initials: C
authors.lastname: Viallesoubranne
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000592:standards*; D007391:International Cooperation; D007753:Laboratories / Q000592:standards*; D011786:Quality Control; D015203:Reproducibility of Results; D013057:Spectrum Analysis / Q000592:standards*; D013997:Time Factors; D014501:Uranium / Q000032:analysis / Q000737:chemistry; D014867:Water
chemical_list: D014867:Water; D014501:Uranium