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Microchimica Acta

, 175:159 | Cite as

Modified ionic liquid cold-induced aggregation dispersive liquid-liquid microextraction followed by atomic absorption spectrometry for trace determination of zinc in water and food samples

  • Mohsen Zeeb
  • Mahdi SadeghiEmail author
Original Paper

Abstract

We report on a new method for the microextraction and determination of zinc (II). The ion is accumulated via ionic-liquid cold-induced aggregation dispersive liquid-liquid microextraction (IL-CIA-DLLME) followed by flame atomic absorption spectrometry (FAAS). The ionic liquid (IL) 1-hexyl-3-methylimidazolium hexafluorophosphate is dispersed into a heated sample solution containing sodium hexafluorophosphate as a common ion source. The solution is then placed in an ice-water bath upon which a cloudy solution forms due to the decrease of the solubility of the IL. Zinc is complexed with 8-hydroxyquinoline and extracted into the IL. The enriched phase is dissolved in a diluting agent and introduced to the FAAS. The method is not influenced by variations in the ionic strength of the sample solution. Factors affecting the performance were evaluated and optimized. At optimum conditions, the limit of detection is 0.18 μg L−1, and the relative standard deviation is 3.0% (at n = 5). The method was validated by recovery experiments and by analyzing a certified reference material and successfully applied to the determination of Zn (II) in water and food samples.

Keywords

Modified ionic liquid cold-induced aggregation dispersive liquid-liquid microextraction Zinc Flame atomic absorption spectrometry Water Food 

Notes

Acknowledgment

Support of this investigation by the Research Council of Agricultural, Medical and Industrial Research School through grant is gratefully acknowledged. We also thank Miss Shakila Savadkouhi for donating the certified reference material.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Agricultural, Medical and Industrial Research SchoolNuclear Science and Technology Research InstituteKarajIran
  2. 2.Department of Analytical Chemistry, Faculty of Chemistry, University College of ScienceUniversity of TehranTehranIran

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