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 UO22+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.

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Author:Isabelle Billard, Eric Ansoborlo, Kathleen Apperson, Sylvie Arpigny, M. Emilia Azenha, David Birch, Pascal Bros, Hugh D. Burrows, Gregory Choppin, Michael Kumke
Series (Serial Number):Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (paper 005)
Document Type:Postprint
Year of Completion:2003
Publishing Institution:Universität Potsdam
Release Date:2007/01/26
Tag:intercomparison; speciation; uranium (VI)
Source:Applied Spectroscopy. - 57 (2003), 8, p. 1027 - 1038
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Notes extern:
first published in:
Applied Spectroscopy. - 57 (2003), 8, p. 1027 - 1038
doi: 10.1366/000370203322259002