Preparation and characterization of chelating resins loaded with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol for preconcentration of rare earth elements |
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| Authors: | Adriana N Masi R A Olsina |
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| Institution: | (1) Department of Analytical Chemistry “Dr. Carlos B. Marone”, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis, San Luis, Argentine, XX |
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| Abstract: | Chelating resins prepared by sorption of 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol (5-BrPADAP) on macroporous resins
(Amberlite XAD-4 and XAD-7) were characterized. The adsorption properties (amount of chelating agent adsorbed per gram of
resin, sorption kinetics, retention capacity, etc.) and the thermodynamic quantities of each adsorption process were determined.
The retention of some rare earth elements (e.g. Er, Yb and Lu) on these chelating resins was studied in order to preconcentrate
them for their determination by X-Ray fluorescence spectrometry.
Received: 7 September 1995/Revised: 2 January 1996/Accepted: 10 January 1996 |
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