Microchimica Acta

, Volume 184, Issue 5, pp 1529–1537 | Cite as

Trace determination of lead(II) ions by using a magnetic nanocomposite of the type Fe3O4/TiO2/PPy as a sorbent, and FAAS for quantitation

Original Paper

Abstract

The authors describe a magnetic nanoadsorbent consisting of magnetite nanoparticles coated first with titanium dioxide and then with polypyrrole (PPy). It is shown to be a viable material for magnetic solid-phase extraction of trace amount of Pb(II). The magnetic titanium dioxide nanoparticles were synthesized first and then modified with PPy via in-situ electropolymerization. The properties, morphology, and composition of the sorbent were characterized by FTIR, scanning electron microscopy, energy-dispersive X-ray analysis and vibrating sample magnetometry. The effects of pH value, extraction time, type and concentration of eluent, and of sample volume were optimized. Under the optimum conditions, the limit of detection (for S/N = 3) is 0.28 μg⋅L−1. The maximum adsorption capacity of the adsorbent is 126 mg⋅g−1 of Pb(II). The accuracy of the method was investigated by analysis of a Certified Reference Material and the obtained value (0.119 μg⋅g−1) was in good agreement with the certified value (0.120 μg⋅g−1). The method was successfully applied to the determination of Pb(II) in a gastropod and spiked environmental and marine water samples. It gave recoveries in the range from 94.4 to 103.1%.

Graphical abstract

Magnetic titanium dioxide nanoparticles were synthesized and modified with PPy via in situ polymerization. The Fe3O4/TiO2/PPy nanocomposite was used for solid-phase extraction and pre-concentration of trace amount of lead(II) ions in complex matrices.

Keywords

MSPE Magnetic nanocomposite In-situ polymerization Scanning electron microscopy EDX FTIR Vibrating sample magnetometry 

Notes

Compliance with ethical standards

The authors declare that they have no competing interests.

Supplementary material

604_2017_2156_MOESM1_ESM.docx (84 kb)
ESM 1 (DOCX 84 kb)

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Copyright information

© Springer-Verlag Wien 2017

Authors and Affiliations

  1. 1.Department of Marine Living Science, Ocean Science Research CenterIranian National Institute for Oceanography and Atmospheric scienceTehranIran
  2. 2.Department of Chemistry, Faculty of ScienceK. N. Toosi University of TechnologyTehranIran

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