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Magnetic graphitic carbon nitride nanoparticles covalently modified with an ethylenediamine for dispersive solid-phase extraction of lead(II) and cadmium(II) prior to their quantitation by FAAS

Abstract

A magnetic graphitic carbon nitride (g-C3N4-SnFe2O4) modified with N-[3-(trimethoxysilyl)propyl] ethylenediamine (TPED) was synthesized and utilized as a nanoadsorbent for the ultrasound-assisted magnetic dispersive microsolid-phase extraction of the ions Pb(II) and Cd(II) from foodstuff. The presence of the TPED group on the nanoadsorbent results in a superior uptake of the analytes via complexation. The grafting of TPED on the adsorbent was corroborated by FT-IR, X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy elemental analysis, and vibrating sample magnetometry. The adsorption and desorption steps were optimized via the central composite experimental design. Following desorption, the ions were quantified via micro-sampling atomic absorption spectrometry. Under optimized conditions, the limits of detection (LODs) are 0.6 and 0.1 μg L −1 for for Pb(II) and Cd(II), respectively, the linear dynamic ranges extend from 2.0 to 600.0 μg L−1, and the relative standard deviations (for n = 5) are 3.6 and 4.6%. Notably, only 5.0 mg of the nanoadsorbent are needed, and it can be reused up to 5 times at extraction recoveries of >99%.

Magnetic graphitic carbon nitride was covalently modified with N-[3-(trimethoxysilyl)propyl] ethylenediamine for Pb(II) and Cd(II) preconcentration by using ultrasound assisted magnetic dispersive micro solid phase extraction method and their quantization via micro-sampling atomic absorption spectrometry.

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Acknowledgements

The authors would like to thank the Semnan University Research Council for the financial support of this work.

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Correspondence to Alireza Asghari.

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Fahimirad, B., Asghari, A. & Rajabi, M. Magnetic graphitic carbon nitride nanoparticles covalently modified with an ethylenediamine for dispersive solid-phase extraction of lead(II) and cadmium(II) prior to their quantitation by FAAS. Microchim Acta 184, 3027–3035 (2017). https://doi.org/10.1007/s00604-017-2273-5

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Keywords

  • Ultrasounic
  • SnFe2O4
  • Metal ions
  • Vegetable
  • Fish meat
  • Water sample