Abstract
The solvent extraction method involving diglycolic acid (dicarboxy methyl ether) as a competitive ligand to lutetium and N-tris[hydroxymethyl]methyl-2-aminoethanesulfonic acid (TES) as a buffer was used to study the hydrolysis of lutetium in 1 mol⋅dm−3 NaCl ionic strength at 303 K. Acid dissociation constants of H2DG and TES were determined and the possible formation of lutetium–TES compounds was investigated. It was found that lutetium does not form compounds with TES under the experimental conditions. The solvent extraction method using 177Lu as a tracer was applied and the first hydrolysis constant of lutetium was determined by means of the relationship of the equilibrium constant of the complex Lu(DG)+ in the absence and in the presence of hydrolysis. The value obtained was log 10 β Lu,H=−7.9±0.3.
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Ramírez-García, J., Jiménez-Reyes, M., Solache-Ríos, M. et al. First Hydrolysis Constant of Lutetium (III) by Solvent Extraction. J Solution Chem 36, 1063–1071 (2007). https://doi.org/10.1007/s10953-007-9167-9
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DOI: https://doi.org/10.1007/s10953-007-9167-9