Novel Ion-imprinted Polymer as a Tool for Selective Determination of SbIII in Natural Waters
Keywords:antimony, speciation, ion-imprinted polymer, solid-phase extraction
A novel SbIII-imprinted polymer was synthesized via radical copolymerization of methacrylic acid and trimethylolpropane trimethacrylate in the presence of 2-mercapto-N-(2-naphthyl)acetamide as a chelating ligand forming the functionality of specific binding sites. The extent of ligand incorporation in the active centres was evaluated by elemental analysis and found to be 73.6%. The IIP was utilized as a sorbent material for selective solid-phase extraction of SbIII in drinking waters after optimization of sorption and desorption processes in a batch mode. Excellent separation of SbIII and SbV was accomplished at pH 8 followed by elution of SbIII with 0.5 M thiocarbamide. Analytical procedure for non-chromatographic speciation and determination of SbIII was developed demonstrating very good precision (RSD 7–11%) and recoveries between 97–105%. This procedure enabled up to 25-fold reconcentration and completely met the requirements of EU legislation for the quality of water intended for human consumption.
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Copyright (c) 2022 Proceedings of the Bulgarian Academy of Sciences
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