화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.56, 321-326, December, 2017
DOI10.1016/j.jiec.2017.07.027  Export Citation
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
Li Yao, Xie Wang, Haitao Liu, Chaowen Lin, Liangyu Pang, Junwei Yang1, and Qingbin Zeng1, †
  • Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, PR China
  • 1Panzhihua Branch of Sichuan Tobacco Company, Panzhihua 617026, PR China
E-mail:
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 Fe3O4 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.
Keywords:Central composite design;Fractional factorial design;Graphite furnace atomic absorption;spectrometry;Heavy metals;Ionic liquid dispersive liquid.liquid;microextraction;Magnetic nanoparticles
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