FORMATION CONSTANTS OF SOME RARE-EARTH COMPLEXES Page: 13 of 97
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4
It has been found that not all ligands give the same
elution order as EDTA. It has also been shown that the
elution order for a given ligand may be predicted if the
stability constants for formation of the complexes are
known. The separation factor for a binary mixture of rare
earths may also be approximated from the stability constants
(3, 4). At the present time, the direct measurement of the
stability constants for the complexes between the rare earths
and a ligand appears to be the most rapid and economical
method for evaluating a potential eluant. The purpose of the
research reported in this dissertation was to determine the
stability constants for the complexes between the rare earths
and the three ligands isobutyrate, a-hydroxyisobutyrate, and
a,p,p'-trihydroxyisobutyrate. The relative merits of these
ligands might then be ascertained.0
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Stagg, W.R. & Powell, J.E. FORMATION CONSTANTS OF SOME RARE-EARTH COMPLEXES, report, August 1, 1963; Ames, Iowa. (https://digital.library.unt.edu/ark:/67531/metadc868780/m1/13/: accessed April 30, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.