Determination of cobalt(II)-EDTA, cobalt(III)-EDTA, and cobalt(II) in an aqueous solution
- Univ. of Maryland, College Park, MD (United States)
The determination of Co-EDTA species is critical to the understanding of radionuclide migration in the environment, as well as determining efficiencies of various complexed-Co treatment technologies. A new, simple column-oxidation separation methodology was devised to determine the fraction of uncomplexed Co(II), Co(II)-EDTA, and Co(III)-EDTA in an aqueous mixture. A Dowex 50W (H{sup +}) ion-exchange resin, and the oxidative conversion of residual Co(II)-EDTA to Co(III)-EDTA using H{sub 2}O{sub 2}, allowed the separation of species fractions. Only atomic absorption spectrophotometric measurements were required after separation of the fractions. Analysis of individual Co species separated from mixtures ranging in concentration from 3 {times} 10{sup {minus}5} to 3 {times} 10{sup {minus}3} M total Co resulted in average recoveries of 97 {plus_minus} 4%. 15 refs., 2 tabs.
- OSTI ID:
- 430955
- Journal Information:
- Journal of Environmental Quality, Vol. 25, Issue 6; Other Information: PBD: Nov-Dec 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analysis of cobalt(II) EDTA and cobalt(III) EDTA in pore water by ion chromatography
Reactive transport of EDTA-complexed cobalt in the presence of ferrihydrite