Magnetic ion imprinted polymer nanoparticles for the preconcentration of vanadium(IV) ions |
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Authors: | Azam Aliakbari Mostafa M Amini Kheirollah Mehrani Hamid Reza Moghadam Zadeh |
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Institution: | 1. Department of Chemistry, Shahid Beheshti University, G.C., 1983963113, Tehran, Iran 2. Department of Chemistry, Islamic Azad University, Science and Research Branch, Tehran, Iran
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Abstract: | An ion imprinted polymer coated onto magnetite (Fe3O4) nanoparticles is shown to be a useful magnetic sorbent for the fairly selective preconcentration of vanadium. The sorbent was prepared by radical copolymerization of 3-(triethoxysilyl)propyl methacrylate (the monomer), ethylene glycol dimethacrylate (the cross-linker), and the vanadium(IV) complex of 1-(2-pyridylazo-2-naphthol) in the presence of magnetite nanoparticles. The material was characterized by IR spectroscopy, scanning electron microscopy, and thermal analysis. The vanadium(IV) ions were removed from the imprint by a solution containing thiourea and HCl, and the eluent was submitted to AAS. The analytical efficiency and relative standard deviation are 99.4 and ±2.3 %, respectively, under optimum conditions, and the limit of detection is 20 ng mL?1. The method was successfully applied to the preconcentration and determination of vanadium(IV) ions in crude oil. Figure An ion imprinted polymer is coated on to magnetite nanoparticles as a useful magnetic sorbent for the fairly selective preconcentration of vanadium which can be used for vanadium determination in crude oil. |
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