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Solid-phase extraction of trace metal ions with magnetic nanoparticles modified with 2,6-diaminopyridine

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Abstract

We have modified silica-coated Fe3O4 nanoparticles with 2,6-diaminopyridine and used these for selective magnetic solid-phase extraction of trace amounts of metal ions. The nanoparticles were characterized by transmission electron microscopy and Fourier transform infrared spectroscopy. Quantitative extraction of trace amounts of Cu(II) and Zn(II) from mixed-ion solutions was accomplished at an optimal pH value of 6 within less than 10 min. The metal ions were eluted from the sorbent with hydrochloric acid. Common electrolytes and chemically related metal ions do not interfere. The relative standard deviations of the method are <4 %. It was successfully applied to the separation and preconcentration of trace metal ions from the certified reference materials GBW 08301 (river sediment) and GBW 08607 (water solution), in natural water, and in samples of vegetable with satisfying results.

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Acknowledgments

Financial support from the Foundation of Xi’an University of Arts and Science (No.ZD200902) and Special Foundation of Department of Education of Shan Xi Province (11JK0574) is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Chemistry and Chemical Engineering, Xi’an University of Arts and Science, Xi’an, 710065, People’s Republic of China

    Yunhui Zhai, Quan Han & Shu’e Duan

  2. Department of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People’s Republic of China

    Qun He

Authors
  1. Yunhui Zhai
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  2. Qun He
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  3. Quan Han
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  4. Shu’e Duan
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Correspondence to Yunhui Zhai.

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Zhai, Y., He, Q., Han, Q. et al. Solid-phase extraction of trace metal ions with magnetic nanoparticles modified with 2,6-diaminopyridine. Microchim Acta 178, 405–412 (2012). https://doi.org/10.1007/s00604-012-0857-7

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  • DOI: https://doi.org/10.1007/s00604-012-0857-7

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