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Conference information: Abstracts, 15th Iranian Chemistry Congress

Abstract: Ion-imprinted polymer (IIP) materials were used for solid-phase extraction (SPE) of ions in different samples. In this study, an ion-imprinting polymer was introduced for selective extraction and preconcentration of zinc from aqueous solution. In synthesis process zinc salt, dithizone, 2-vinylpyridine (VP), ethyleneglycol dimethacrylate (EGDMA) and 2, 2-azobisisobutyronitrile (AIBN) were used as template, Zn(II) complexing reagent, functional monomer, cross-linker and initiator, respectively. This polymer has been characterized on the basis of FT-IR and thermal analysis (TGA, DTA & DSC). The polymer block obtained was ground and sieved (55-75μm) and Zn(II) ions were removed from polymer particles by leaching with 1 M of EDTA for 72 h,which leaves a cavity in the polymer particles. The ion imprinted particles (IIPs) was applied for the selective extraction of Zn(II) from water. The maximum adsorption capacity of Zn(II) on IIPs was about 3.4 mg g-1. The effect of pH, type of buffer and flow rate for quantitative enrichment was also investigated. A detection limit of 5.00×10-3 mg L-1 and a relative standard deviation 4.7% were obtained. The IIP–SPE preconcentration procedure showed a linear calibration curve within concentration range from 0.05 to 10 mg L-1 for Zn(II)
Template and target information: zinc ion, Zn(II)