Abstract
A new ion exchange resin based on a UO 2 2+ imprinted polymer was used for the removal and concentration of UO 2 2+ from aqueous solution prior to spectroscopic determination. The imprinted resin performance is compared with results obtained using Chelex-100 ion exchange resin. The UO 2 2+ ion imprinted resin, being more selective towards UO 2 2+ ion, provides a fast and virtually interference-free preconcentration procedure. The separation provides for the elimination of interferences in photometry and plasma spectroscopy, improves accuracy and lowers limits of detection. The performance of the imprinted resin allows for the development of a field test kit for the determination of UO 2 2+ in environmental samples based on colorimetric analysis. A mini-column permitted large enrichment factors to be attained, provided rapid processing of large volumes and quantitative recovery of UO 2 2+ with an eluent suitable for photometric analysis.
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