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Thiol-rich polyhedral oligomeric silsesquioxane modified magnetic nanoparticles for the high-efficient separation and preconcentration of Cd(II) and Pb(II) in food and water prior to ICP-OES determination

Abstract

A new protocol of separation and preconcentration of Cd(II) and Pb(II) in some food and water samples was developed by thiol-rich polyhedral oligomeric silsesquioxane modified magnetic nanoparticles (Fe3O4@SiO2/POSS-SH). The prepared magnetic adsorbent was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy and vibrating sample magnetoscopy. Cd(II) and Pb(II) were measured by ICP-OES after elution with 1mL 1.0 mol L-1 HNO3. The influences of the analytical parameters including pH, eluent, sample volume, contact time and co-existing ions have been investigated in detail. The limits of detection were found to be 0.08 and 0.12 μg L-1 for Cd and Pb, respectively, with an enrichment factor 100. The proposed method was validated by two certified reference materials, and applied successfully for the determination of Cd(II) and Pb(II) in rice, mushroom, pork, apple juice, bottled water and tap water with satisfied recoveries.

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Publication details

The article was received on 01 Jul 2018, accepted on 12 Sep 2018 and first published on 14 Sep 2018


Article type: Paper
DOI: 10.1039/C8JA00223A
Citation: J. Anal. At. Spectrom., 2018, Accepted Manuscript
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    Thiol-rich polyhedral oligomeric silsesquioxane modified magnetic nanoparticles for the high-efficient separation and preconcentration of Cd(II) and Pb(II) in food and water prior to ICP-OES determination

    P. Li, J. Wang, F. Pei, Q. Liu, Y. Fang and Q. Hu, J. Anal. At. Spectrom., 2018, Accepted Manuscript , DOI: 10.1039/C8JA00223A

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