Magnetic ion imprinted polymer nanoparticles for the preconcentration of vanadium(IV) ions
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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.
KeywordsVanadium determination Fe3O4 magnetic nanoparticle Ion imprinted polymer Crude oil
The financial support of Iranian National Science Foundation (Grant No. 91002839) is gratefully acknowledged.
- 3.Valkovic V (1978) Trace elements in petroleum. The Publishing Co., TulsaGoogle Scholar
- 11.Nukatsuka I, Shimizu Y, Onzeki K (2002) Determination of V(IV) and V(V) by electrothermal atomic absorption spectrometry following selective solid-phase extraction and the study on the change in the oxidation state of vanadium species in seawater during the sample storage. Anal Sci 18:1009CrossRefGoogle Scholar
- 21.Sadeghi O, Amini MM, Feiz Bakhsh Bazargani M, Mehrani A, Aghabali A, Adineh M, Amani V, Mehrani K (2012) Immobilization of metalloporphyrin on functionalized magnetic nanoparticles as a catalyst in oxidation of cyclohexene: Novel modified Fe3O4 nanoparticles with triethoxysilane Agent. J Inorg Organomet Polym 22:530CrossRefGoogle Scholar
- 28.Quadros DPC, Chaves ES, Lepri FG, Borges DLG, Welz B, Becker-Ross H, Curtius AJ (2010) Evaluation of Brazilian and Venezuelan crude oil samples by means of the simultaneous determination of Ni and V as their total and non-volatile fractions using high-resolution continuum source graphite furnace atomic absorption spectrometry. Energy Fuels 24:5907CrossRefGoogle Scholar