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Reference type: Journal
Authors: Fereidoonipour F, Rajabi HR
Article Title: Development of flow injection analysis-solid phase extraction based on ion imprinted polymeric nanoparticles as an efficient and selective technique for preconcentration of zinc ions from aqueous solution.
Publication date: 2017
Journal: New Journal of Chemistry
Volume: 41
Issue: (17)
Page numbers: 8828-8836.
DOI: 10.1039/C7NJ00893G

Abstract: Here, a new flow injection analysis-solid phase extraction (FIA-SPE) technique was developed by using zinc ion imprinted polymeric nanoparticles (Zn-IIP NPs) for the separation and preconcentration of Zn2+ ions from aqueous solutions. For the synthesis of a nano-sized Zn-IIP, a stable chelate of Zn2+ ions with 3,5,7,2',4'-pentahydroxyflavone was formed and then it was copolymerized with methacrylic acid, in the presence of ethyleneglycoldimethacrylate, through a precipitation polymerization technique. From the scanning electron microscopic images, the prepared Zn-IIP NPs were observed to be spherical in shape with an average particle size of 63 nm. Based on the Brunauer-Emmett-Teller adsorption isotherm studies, the surface area, pore volume and average pore diameter of the Zn-IIP NPs were found to be 211.9 m2 g-1, 10 484 cm3 g-1 and 19.8 nm, respectively. After characterization, a FIA-SPE setup was designed based on the prepared Zn-IIP NPs, as a potential selective solid phase extractor toward Zn2+ ions. In the determination step, a standard spectrophotometric method was performed based on the formation of a colored complex between the eluted Zn2+ ions and an ethanolic solution of dithizone (λmax = 538 nm). The optimum experimental conditions for quantitative preconcentration and determination of Zn2+ ions were achieved at pH 6.0 and 5.0 of the initial sample and complex solution, at the loading and leaching flow rates of 0.5 and 5 mL min-1, respectively. The present FIA-SPE procedure offers a reasonable detection limit (3.93 x 10-7 mol L-1) and preconcentration factor (116.7) with acceptable repeatability (1.91%)
Template and target information: zinc ion, Zn(II)

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