Complex formation of uranium(VI) in periodate solutions

被引：8
作者：
Karbowiak, M
Hubert, S
Fourest, B
Moulin, C
机构：
[1] Inst Phys Nucl, UMR 8608, F-91406 Orsay, France
[2] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland
[3] CEA Saclay, DEN, DPC, SECR, F-91191 Gif Sur Yvette, France
来源：
RADIOCHIMICA ACTA | 2004年 / 92卷 / 08期
关键词：
uranium(VI); periodate; complex formation; fluorescence spectroscopy; time-resolved laser-induced fluorescence spectroscopy; capillary electrophoresis;
D O I：
10.1524/ract.92.8.489.39277
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The uranyl/periodate system was investigated by Time-Resolved Laser-Induced Fluorescence Spectroscopy (TRLIFS), and Capillary Electrophoresis (CE) in 0.1 and 0.05 mol L-1 perchloric solutions at pH 2.6, containing various amounts of periodate anions. The formation of only one complex, UO2IO4+, was observed for a periodate concentration ranging from 5 x 10(-5) to 10(-1) mol L-1. The stability constant of this complex was estimated to be log beta(11) = 1.8 +/- 0.2 by TRLIFS (fluorescence titration) and log beta(11) = 2.0 +/- 0.2 by CE, for an ionic strength of 10(-1) and 5 x 10(-2) mol L-1, respectively. Moreover, the 1 : 1 stoichiometrical ratio between uranium(VI) and periodate was confirmed by an analysis of the results obtained from the deconvolution of fluorescence spectra.
引用
收藏
页码：489 / 494
页数：6
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