Speciation of Tc(IV) in chloride solutions by capillary electrophoresis
2005; R. Oldenbourg Verlag; Volume: 93; Issue: 5 Linguagem: Inglês
10.1524/ract.93.5.305.64276
ISSN2193-3405
AutoresXiaolan Liu, Frédéric Poineau, Massoud Fattahi, Bernd Grambow, L. Vichot,
Tópico(s)Chemical Synthesis and Characterization
ResumoSummary A method for speciation of Tc(IV) species (TcCl 6 2− and TcCl 5 (H 2 O) − ) in chloride solutions, using capillary electrophoresis (CE) technique was developed. The proposed method has overcome the difficulties of unstable oxidation states analysis by shortening their travel time in the capillary. TcCl 6 2− and TcCl 5 (H 2 O) − were thus separated without being hydrolyzed and polymerized, and their UV/Vis spectra were recorded. With a 1 M HCl/NaCl buffer solution (pH=1), the electrophoretic mobilities were determined as 5.47×10 −4 cm 2 /Vs for TcCl 6 2− and 2.13×10 −4 cm 2 /Vs for TcCl 5 (H 2 O) − at 25 °C. The total analysis time for one run is 12 minutes.
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