Authors: Mohsen Zeeb Behrooz Mirza Rouholah ZareDorabei Hadi Farahani
Publish Date: 2014/02/13
Volume: 7, Issue: 9, Pages: 1783-1790
Abstract
A new and practical sample enrichment method termed ionic liquidbased ultrasoundassisted in situ solvent formation microextraction ILUAISFME was combined with electrothermal atomic absorption spectrometry ETAAS for preconcentration and trace determination of vanadium in real samples In this sample enrichment methodology a hydrophilic ionic liquid IL HmimBF4 was added to the aqueous media containing an ionexchange reagent NaPF6 in order to obtain a hydrophobic IL HmimPF6 as the microextraction solvent The hydrophobic extraction solvent formed under these conditions was completely dispersed into the sample solution using ultrasonic radiation Vanadium was complexed with NbenzoylNphenylhydroxylamine BPHA and extracted into the IL phase during the dispersion of the hydrophobic IL Main variables affecting the recommended method was studied in details and optimized Under the optimum conditions the combined methodology provided a linear dynamic range of 15–2500 ng l−1 a limit of detection LOD of 47 ng l−1 and a relative standard deviation RSD of 40 The accuracy and validity of the method was checked by analyzing a certified standard reference material of water SRM1643e Finally the developed method was utilized for quantitation of vanadium in real water and milk samples
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