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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作者:
Masi, AN
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NATL UNIV SAN LUIS,DEPT ANALYT CHEM DR CARLOS B MARONE,FAC CHEM BIOCHEM & PHARM,SAN LUIS,ARGENTINANATL UNIV SAN LUIS,DEPT ANALYT CHEM DR CARLOS B MARONE,FAC CHEM BIOCHEM & PHARM,SAN LUIS,ARGENTINA
Masi, AN
[1
]
Olsina, RA
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NATL UNIV SAN LUIS,DEPT ANALYT CHEM DR CARLOS B MARONE,FAC CHEM BIOCHEM & PHARM,SAN LUIS,ARGENTINANATL UNIV SAN LUIS,DEPT ANALYT CHEM DR CARLOS B MARONE,FAC CHEM BIOCHEM & PHARM,SAN LUIS,ARGENTINA
Olsina, RA
[1
]
机构:
[1] NATL UNIV SAN LUIS,DEPT ANALYT CHEM DR CARLOS B MARONE,FAC CHEM BIOCHEM & PHARM,SAN LUIS,ARGENTINA
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.