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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
Author(s) -
Dadfarnia Shayessteh,
Haji Shabani Ali Mohammad,
Dehghanpoor Frashah Shahab
Publication year - 2016
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201501301
Subject(s) - vanadium , detection limit , ethylene glycol dimethacrylate , chemistry , solid phase extraction , sorbent , atomic absorption spectroscopy , polymer , fourier transform infrared spectroscopy , adsorption , methacrylic acid , nuclear chemistry , analytical chemistry (journal) , monomer , chromatography , inorganic chemistry , chemical engineering , organic chemistry , physics , engineering , quantum mechanics
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.