Complex formation of trivalent americium with salicylic acid at very low concentrations |
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| Authors: | Melanie Müller Margret Acker Steffen Taut Gert Bernhard |
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| Institution: | 1.Department of Chemistry and Food Chemistry,Technische Universit?t Dresden,Dresden,Germany;2.Central Radionuclide Laboratory,Technische Universit?t Dresden,Dresden,Germany;3.Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf,Dresden,Germany |
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| Abstract: | For the first time, the complexation of americium(III) with salicylic acid was studied at trace metal concentrations using
a 2.0 m Long Path Flow Cell for UV–vis spectroscopy. The detection limit of Am(III) in aqueous solution at pH 3.0 was found
to be 5 × 10−9 M. Two Am(III)-salicylate complexes were formed at pH 5.0 in 0.1 M NaClO4, indicated by a clear red shift of the absorption maximum. The absorption spectra obtained from spectrophotometric titration
were analyzed by means of factor analysis and complex stabilities were calculated to be log β110 = 2.56 ± 0.08 and log β120 = 3.93 ± 0.19. |
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