Issue |
Analusis
Volume 28, Number 1, January/February 2000
IR-Raman
|
|
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Page(s) | 93 - 96 | |
Section | Original articles | |
DOI | https://doi.org/10.1051/analusis:2000103 |
DOI: 10.1051/analusis:2000103
Perfecting the separation and measurement of calixarene Dioctyl Calix-[4]-Crown-6 by high performance liquid chromatography with UV detection
A. DodiDirection du Cycle du Combustible - Département d'Entreposage et de Stockage des Déchets, C.E.A. Cadarache, 13108 Saint-Paul-lez-Durance, France
(Received November 23, 1999; revised and accepted February 8, 2000.)
Abstract
Calix-[4]-crown-6 display an exceptional selectivity towards cesium, due to their preorganization and
their complementarity between the size of the crown and that of this cation. Their application in the
field of nuclear industry allows this element to be very selectively extracted from nitric solutions
obtained from the dissolution of nuclear spent fuel. The studies dealing with extraction of cesium by
calixarenes involve knowing how to measure this complexing molecule into its solvent. The solvent is a
mixture of Nitro-2-PhenylHexylEther (NPHE) and Tetra Propylene Hydrogenated (TPH). Since TPH is saturated,
and thus, non UV absorbing molecule, its presence into the mixture will not interfere; on the other hand,
NPHE, which exhibits chemical fonctionalities and an hydrophobicity quite similar to those of calixarene,
must be separated from the complexing molecule. We have determined the conditions of separation between
calixarene and its solvent by using the adsorption chromatographic mode over silica, associated with an
organic eluent composed of hexane and isopropanol. In these conditions, separation of the calixarene from
NPHE is accomplished in less than 8 minutes.
Key words: Calixarene -- adsorption chromatography.
© EDP Sciences, Wiley-VCH 2000