Aqueous solutions of uranium(VI) as studied by time-resolved emission spectroscopy: a round-robin test.
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.
Billard
Isabelle
I
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
Ansoborlo
Eric
E
Apperson
Kathleen
K
Arpigny
Sylvie
S
Azenha
M Emilia
ME
Birch
David
D
Bros
Pascal
P
Burrows
Hugh D
HD
Choppin
Gregory
G
Couston
Laurent
L
Dubois
Veronique
V
Fanghänel
Thomas
T
Geipel
Gerhard
G
Hubert
Solange
S
Kim
Jae I
JI
Kimura
Takaumi
T
Klenze
Reinhardt
R
Kronenberg
Andreas
A
Kumke
Michael
M
Lagarde
Gerard
G
Lamarque
Gerard
G
Lis
Stefan
S
Madic
Charles
C
Meinrath
Gunther
G
Moulin
Christophe
C
Nagaishi
Ryuji
R
Parker
David
D
Plancque
Gabriel
G
Scherbaum
Franz
F
Simoni
Eric
E
Sinkov
Sergei
S
Viallesoubranne
Carole
C
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
D014867:Water; D014501:Uranium