Development of Solid Phase Extraction Method Based on Ion Imprinted Polymer for Determination of Cr(III) Ions by ETAAS in Waters

In this work, a new solid phase extraction method for the determination of chromium species in water samples by electrothermal atomic absorption spectrometry was developed. For selective separation Cr(III) ions under dynamic conditions, two ion imprinted polymers containing Cr(III)-1,10-phenanthroline complex (Cr(III)-phen) were prepared with use one (styrene, ST) or (styrene and 4-vinylpyridine, ST-4VP) functional monomers. The physicochemical properties those sorbents towards studied compared. It found that retained on Cr(III)-phen-ST Cr(III)-phen-ST-4VP high efficiency repeatability (91.6% 92.9%, RSD < 2%) from solutions at pH 4.5. quantitative recovery analyte (91.7% 93.9%, 4%) obtained 0.1 mol/L EDTA solution. introduction 4VP, an additional monomer, improved selectivity polymer presence Cu(II), Mn(II) Fe(III) ions, slightly decreased sorption capacity stability polymer. accuracy procedures based both polymeric proved analyzing standard reference material surface SRM 1643e. using applied determining tap infusion green tea.