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K. P. Zhernosekov, E. Mauerhofer, G. Getahun, Peter Warwick, Frank Rösch

Complex formation of Tb³⁺ with glycolate, D-gluconate and α-isosaccharinate in neutral aqueous perchlorate solutions

An electromigration technique was used for measurements of metal-ligand formation constants of non-carrier-free ¹⁶⁰Tb³⁺ with glycolate, D-gluconate and α-isosaccharinate ligands. The overall ion mobilities of Tb at different concentrations of the ligands were measured in chemically inert perchlorate solutions (pH 7 and T= 298.1K) with an overall ionic strength μ = 0.1. The stepwise stoichiometric stability constants are: Tb³⁺/glycolate: log K₁=2.72(18), log K₂=1.73(19), log K₃= 1.12(17), Tb³⁺/D-gluconate: log K₁=2.96(11), log K₂=2.60(11), log K₃=1.13(9), Tb³⁺/α-ISA: log K₁=3.07(8), log K₂ = 2.69(11), log K₃ = 1.80(12).

Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 91, 10/2003
Pages: 599

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