caa a22 4500 378851276 CHVBK 20180305123324.0 cr unu---uuuuu 161128e20030901xx s 000 0 eng 10.1524/ract.91.9.505.20002 doi (NATIONALLICENCE)gruyter-10.1524/ract.91.9.505.20002 Complexation of U(VI) with iodate ions: determination of stability constants by using spectroscopic methods and capillary zone electrophoresis [Elektronische Daten] [M. Karbowiak, B. Fourest, S. Hubert, Christophe Moulin] The uranyl iodate system has been studied by using three speciation methods: laser-induced time-resolved fluorescence spectroscopy (TRLIFS), UV-visible spectrophotometry and capillary zone electrophoresis with direct UV detection (CZE). Two uranyl iodate complexes were found: UO2IO3- and UO2(IO3)2 in 0.05M NaClO4 solutions of pH 2.6, depending on the iodate concentration. The three methods are convenient and efficient for determining the complex formation constants of the two complexes. The variation of the uranyl mobility as a function of the ligand concentration is very simple to analyse and its fitting leads to accurate thermodynamic data. The values obtained for log β11 (1.6±0.1) and log β12 (3.05±0.1) are in good agreement with the previously published values. Both complexes were also characterized by their fluorescence spectra and fluorescence lifetime. From the analysis of the fluorescence spectra, taking into account the dynamic quenching, the complex formation constants were calculated, in reasonable agreement with the ones obtained by capillary electrophoresis: log β11 (1.5±0.2) and log β12 (3.6±0.2). © 2003 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Karbowiak M. aut Fourest B. aut Hubert S. aut Moulin Christophe aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/9/2003(2003-09-01), 505-512 0033-8230 91:9/2003<505 2003 91 ract https://doi.org/10.1524/ract.91.9.505.20002 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.91.9.505.20002 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Karbowiak M. aut NATIONALLICENCE 700 1- Fourest B. aut NATIONALLICENCE 700 1- Hubert S. aut NATIONALLICENCE 700 1- Moulin Christophe aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/9/2003(2003-09-01), 505-512 0033-8230 91:9/2003<505 2003 91 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter