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  • Title: Extraction of cesium ions from aqueous solutions using calix[4]arene-bis(tert-octylbenzo-crown-6) in ionic liquids.
    Author: Luo H, Dai S, Bonnesen PV, Buchanan AC, Holbrey JD, Bridges NJ, Rogers RD.
    Journal: Anal Chem; 2004 Jun 01; 76(11):3078-83. PubMed ID: 15167785.
    Abstract:
    Solvent extraction of cesium ions from aqueous solution to hydrophobic ionic liquids without the introduction of an organophilic anion in the aqueous phase was demonstrated using calix[4]arene-bis(tert-octylbenzo-crown-6) (BOBCalixC6) as an extractant. The selectivity of this extraction process toward cesium ions and the use of a sacrificial cation exchanger (NaBPh(4)) to control loss of imidazolium cation to the aqueous solutions by ion exchange have been investigated.
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