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Solid-phase extraction of mercury(II) with magnetic core-shell nanoparticles, followed by its determination with a rhodamine-based fluorescent probe

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Abstract

Magnetic Fe3O4@SiO2 core shell nanoparticles containing diphenylcarbazide in the shell were utilized for solid phase extraction of Hg(II) from aqueous solutions. The Hg(II) loaded nanoparticles were then separated by applying an external magnetic field. Adsorbed Hg(II) was desorbed and its concentration determined with a rhodamine-based fluorescent probe. The calibration graph for Hg(II) is linear in the 60 nM to 7.0 μM concentration range, and the detection limit is at 23 nM. The method was applied, with satisfying results, to the determination of Hg(II) in industrial waste water.

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Acknowledgments

This study was supported by the Natural Science Foundation of Anhui Province (1208085QB34, 2012SQRL148ZD) and Anhui Science and Technology University Key Subject (AKXK20102-2). Thanks Dr. Qun He, and Dr. Yun-Hui Zhai for magnetic core shell material synthesis and characteristics research. Thanks Dr. Zhiwei Zhang, and Dr. En Zhang for NMR measurement and structure analysis.

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Authors and Affiliations

  1. College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, People’s Republic of China

    Feng Pan, Qiang Chen & Pengbo Wang

  2. Department of Chemistry, Anhui Science and Technology University, Bengbu, Anhui, 233100, People’s Republic of China

    Jie Mao

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  1. Feng Pan
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Correspondence to Feng Pan.

Electronic supplementary material

Electronic Supplementary Material (ESM) available: Synthesis of RP, RP fluorescence response on Hg(II), Job’s plot, pH effect on RP fluorescence, Interference data of potentially interfering ion. This material is available free of charge via the internet at http://link.springer.com/journal/604.

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Pan, F., Mao, J., Chen, Q. et al. Solid-phase extraction of mercury(II) with magnetic core-shell nanoparticles, followed by its determination with a rhodamine-based fluorescent probe. Microchim Acta 180, 1471–1477 (2013). https://doi.org/10.1007/s00604-013-1084-6

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  • DOI: https://doi.org/10.1007/s00604-013-1084-6

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