Optimization of ultrasound-assisted magnetic retrieval-linked ionic liquid dispersive liquid-liquid microextraction for the determination of cadmium and lead in water samples by graphite furnace atomic absorption spectrometry

文献类型： 外文期刊

第一作者： Wang, Xie

作者： Wang, Xie;Liu, Haitao;Lin, Chaowen;Pang, Liangyu;Yang, Junwei;Zeng, Qingbin

作者机构：

关键词： Central composite design;Fractional factorial design;Graphite furnace atomic absorption spectrometry;Heavy metals;Ionic liquid dispersive liquid-liquid microextraction;Magnetic nanoparticles

期刊名称：JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY （ 影响因子：6.064； 五年影响因子：5.914 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： A simple and efficient method for the determination of Cd and Pb in water samples was developed by ultrasound-assisted magnetic retrieval-linked ionic liquid dispersive liquid-liquid microextraction (UA-MR-IL-DLLME) preconcentration and graphite furnace atomic absorption spectrometry (GFAAS) detection. Ionic liquid (IL) [Hmim] [PF6] was used as the extractant, ammonium pyrrolidine dithiocarbamate (APDC) as the complexing agent and Fe(3)o(4) nanoparticles as the sorbent, while ultrasound was applied to assist the dispersion of the extractant and accelerate the mass transfer process. The effect of different factors on the extraction efficiency including pH, IL volume, APDC amount, ultrasound extraction time, ultrasound desorption time and Fe3O4 amount was studied by a fractional factorial design to screen for the most important factors. Then a central composite design was used to optimize the significant factors. Under the optimal conditions, the method has linear calibration curves over the range of 0.3-20 ng/mL for Cd and 0.5-40 ng/mL for Pb, with correlation coefficients (R) of 0.9990 and 0.9986 for Cd and Pb, respectively. The limits of detection were 0.1 ng/mL and 0.15 ng/mL with relative standard deviations of 3.4% and 2.8% for Cd and Pb, respectively. Finally, the method was successfully applied for the determination of Cd and Pb in the real water samples and satisfactory recoveries were achieved. (C) 2017 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry.

分类号： TQ

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