Complexing Properties of α-Isosaccharinate: Stability Constants, Enthalpies and Entropies of Th-complexation with Uncertainty Analysis
Journal article, 2006

The complexation of Th-alpha-isosaccharinate has been examined using liquid-liquidextraction technique. An organic phase consisting of 0.025 M acetylacetone in toluene was used with a 1.0 M NaClO4 aqueous phase kept at pH 8 in a thermostated AKUFVE unit. Two temperatures, 15 degrees C and 35 degrees C, were investigated and the stability constants for the complexation reaction Th4+ + pISA <-> Th(ISA(-))(p)((4-p)+) were determined by curve fitting of a distribution ratio equation to experimental data employing a chi(2) method to estimate the standard deviation. By incorporating data from a previous study at 25 degrees C, Delta H degrees and AS' for the reaction were also obtained, using randomly generated, binomially distributed, data points around the stability constant values with one standard deviation in two dimensions. Three alpha-isosaccharinate ligands were found to be involved in the complexation with thorium.


Stefan Allard

Chalmers, Chemical and Biological Engineering, Nuclear Chemistry

Christian Ekberg

Chalmers, Chemical and Biological Engineering, Nuclear Chemistry

Journal of Solution Chemistry

0095-9782 (ISSN) 1572-8927 (eISSN)

Vol. 25 8 1173-1186

Subject Categories

Chemical Sciences



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