Journal
TALANTA
Volume 131, Issue -, Pages 361-365Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2014.07.099
Keywords
Microextraction; Nickel; Lead; Ammonium pyrrolidine dithiocarbamate; Ionic liquid; SiO2 nanoparticle
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Funding
- Scientific and Technological Research Council of Turkey (TUBITAK) under 2216 Research Fellowship Program for Foreign Citizens
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A microextraction method for the determination of nickel and lead using solid-liquid-solid dispersive extraction followed by ionic liquid-based dispersive liquid-liquid microextraction (SLSDE-ILDLLME) was presented. It was applied to the extraction of nickel and lead from food samples. Ammonium pyrrolidine dithiocarbamate (APDC) as complexing agent, [C4MIM][PF6] as ionic liquid, SiO2 as nanoparticles and 2 mol L-1 HNO3 as eluent were used. Several important parameters such as amount of IL, extraction time, pH and volume of the complexing agent were investigated. The quantitative recoveries were obtained at pH 7.0 for analytes. Under the optimum conditions, the limits of detection (LODs) calculated using blank, 3(Sd)(blank)/m were 0.17 for Ni(II) and 0.79 mu g L-1 for Pb(II) for aqueous solutions with 125 enrichment factor (EF). The limit of detections of the analyte ions (3(Sd)(blank)/m) for solid samples were 0.09 mu g g(-1) (Ni) and 0.40 mu g g(-1) (Pb). The accuracy of the proposed method was confirmed by the analysis of standard reference material (1577c bovine liver) and spiked recovery test. The proposed method was applied to determine nickel and lead levels in chicken, fish and meat samples. (C) 2014 Elsevier B.V. All rights reserved.
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