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

Stefan Allard (Institutionen för kemi- och bioteknik, Kärnkemi) ; Christian Ekberg (Institutionen för kemi- och bioteknik, Kärnkemi)
Journal of Solution Chemistry (0095-9782). Vol. 25 (2006), 8, p. 1173-1186 .
[Artikel, refereegranskad vetenskaplig]

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.

To obtain a copy: Stefan Allard, Ph.D. Chalmers University of Technology Department of Chemical and Biological Engineering Nuclear Chemistry SE-412 96 Göteborg Sweden stefane@chalmers.se Phone: +46 (0)31 772 10000

Denna post skapades 2007-01-10. Senast ändrad 2015-11-05.
CPL Pubid: 25120


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Kärnkemi (2005-2014)



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