Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Mixed Ligand Chelate Extraction of Lanthanides with 5, 7-Dibromo-8-quinolinol and 4, 4′-(5-Nonyl)-2, 2′-dipyridylamine Systems
K. FUJINAGAM. HOJJATIEH. FREISER
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1988 Volume 4 Issue 2 Pages 139-142

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Abstract

The equilibrium extraction behavior of a series of representative tervalent lanthanide ion, Pr, Eu and Yb, using 5, 7-dibromo-8-quinolinol (DBQ) as a chelating extractant, either alone or in combination with 4, 4′-(5-nonyl)-2, 2′-dipyridylamine (NDPA) as an adductant has been studied. The stoichiometry, extraction constants, and separation factors were determined. The results demonstrate that lanthanides are extracted as simple chelates, LnQ3, at lower HQ concentrations, or as self-adduct chelates, LnQ3•HQ, at higher HQ concentrations. In the presence of NDPA, mixed ligand chelates of either the type LnQ3•NDPA or LnQ2(HA)•NDPA (were HA- is the hydrogensuccinate ion) have been observed.

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© The Japan Society for Analytical Chemistry
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