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Triazine-modified magnetite nanoparticles as a novel sorbent for preconcentration of lead and cadmium ions

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Abstract

We report on a new sorbent for preconcentration of cadmium and lead ions that is based on triazine-functionalized magnetite nanoparticles that were prepared by direct silylation of magnetic nanoparticles with 3-aminopropyltriethoxysilane-2,4-bis(3,5-dimethylpyrazol)-triazine. The sorbent was characterized by IR spectroscopy, X-ray powder diffraction, scanning electron microscopy, thermal and elemental analysis. The sorbent was applied to the preconcentration of lead and cadmium ions which then were quantified by FAAS. The effects of sample pH value, extraction time, of type, concentration and volume of eluent, and of elution time were optimized. The limits of detection are 0.7 ng mL−1 for Pb(II) ion and 0.01 ng mL−1 for Cd(II). The effects of potentially interfering ions often found in real samples on the recovery in the determination of cadmium and lead ions in real samples were also investigated. The accuracy of the method was confirmed by analyzing the certified reference materials NIST 1571 (orchard leaves) and NIST 1572 (citrus leaves). Finally, the method was successfully applied to the determination of cadmium and lead ions in some fruit samples.

We report on a new sorbent for preconcentration of cadmium and lead ions that is based on triazine-functionalized magnetite nanoparticles. After optimization of the preconcentration step the method was successfully applied to the determination of cadmium and lead ions in some fruit samples

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Acknowledgments

The authors thank the Vice-President’s Office for Research Affairs of Shahid Beheshti University for supporting this work.

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Authors and Affiliations

  1. Department of Chemistry, Shahid Beheshti University, G.C., Tehran, 1983963113, Iran

    Sara Karimi Behzad & Mostafa M. Amini

  2. Environmental Sciences Research Institute, Shahid Beheshti University, G.C., Tehran, 1983963113, Iran

    Ali Balati

  3. Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran

    Mohammad Ghanbari

Authors
  1. Sara Karimi Behzad
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  2. Ali Balati
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  3. Mostafa M. Amini
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  4. Mohammad Ghanbari
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Correspondence to Mostafa M. Amini.

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Behzad, S.K., Balati, A., Amini, M.M. et al. Triazine-modified magnetite nanoparticles as a novel sorbent for preconcentration of lead and cadmium ions. Microchim Acta 181, 1781–1788 (2014). https://doi.org/10.1007/s00604-014-1223-8

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  • DOI: https://doi.org/10.1007/s00604-014-1223-8

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