Reference type: Journal
Authors: Dadfarnia S, Haji Shabani AM, Dehghanpoor Frashah S
Article Title: Synthesis and application of a nanoporous ion-imprinted polymer for the separation and preconcentration of trace amounts of vanadium from food samples before determination by electrothermal atomic absorption spectrometry.
Publication date: 2016
Journal: Journal of Separation Science
Volume: 39
Issue: (8)
Page numbers: 1509-1517.
DOI: 10.1002/jssc.201501301

Abstract: A vanadium ion-imprinted polymer was synthesized in the presence of V(V) and N-benzoyl-N-phenyl hydroxyl amine using 4-vinyl pyridine as the monomer, ethylene glycol dimethacrylate as the cross linker and 2,2'-azobis(isobutyronitrile) as the initiator. The imprinted V(V) ions were completely removed by leaching the polymer with 5 mol/L nitric acid, and the polymer structure was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The ion-imprinted polymer was used as the sorbent in the development of the solid-phase extraction method for V(V) prior to its determination by electrothermal atomic absorption spectrometry. The maximum sorption capacity for V(V) ions was 26.7 mg/g at pH 4.0. Under the optimum conditions, for a sample volume of 150.0 mL, an enrichment factor of 289.0 and a detection limit of 6.4 ng/L were obtained. The developed method was successfully applied to the determination of vanadium in parsley, zucchini, black tea, rice, and water samples
Template and target information: vanadium ion, V(V)
Author keywords: Electrothermal atomic absorption spectrometry, Food samples, Ion-imprinted polymer, Solid-phase extraction, Vanadium