Microchimica Acta

, 186:88 | Cite as

Porous magnetized carbon sheet nanocomposites for dispersive solid-phase microextraction of organophosphorus pesticides prior to analysis by gas chromatography-ion mobility spectrometry

  • Mansoure Kermani
  • Mohammad T. JafariEmail author
  • Mohammad Saraji
Original Paper


Carbon sheets were attached to magnetite (Fe3O4) nanoparticles. The resulting nanocomposite is shown to be a viable sorbent for use in magnetic dispersive solid-phase microextraction of three organophosphorus pesticides. The sorbent was synthesized via the sol-gel process followed by calcination and was characterized by an X-ray diffractometer, field emission scanning electron microscopy and energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and Raman spectrometry techniques. The affecting parameters in the adsorption and desorption steps were assessed and optimized via response surface methodology. Following desorption with dichloromethane, the OPPs were quantified by gas chromatography along with ion mobility spectrometry detection. Under optimized conditions, the limits of detection were 1.00, 0.46 and 0.85 μg L−1 for fenthion, malathion and chlorpyrifos, respectively. Response is linear in the concentration range of 2–500 μg L−1 for fenthion and malathion, and 2–1000 μg L−1 for chlorpyrifos with the determination coefficient larger than 0.9969. The intra-day and inter-day precision were from 3 to 9% and 5 to 16%, respectively. The enrichment factor was greater than 142 for all the studied pesticides. The sorbent was used for analyze spiked water and vegetable samples and gave relative recovery higher than 82%.

Graphical abstract

A flowchart of the synthesis of porous magnetized carbon sheet nanocomposites and the process of the magnetic dispersive solid-phase microextraction (MD-μ-SPE) of three organophosphorus pesticides prior to analysis by gas chromatography-ion mobility spectrometry (GC-IMS).


Magnetite nanoparticle Carbon nano-sheets Dispersive microextraction Response surface methodology GC-IMS 



The Research Council of Isfahan University of Technology (IUT) and the Center of Excellence in Sensor and Green Chemistry are acknowledged for financially supporting this work.

Compliance with ethical standards

The author(s) declare that they have no competing interests.

Supplementary material

604_2018_3215_MOESM1_ESM.docx (626 kb)
ESM 1 (DOCX 625 kb)


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  • Mansoure Kermani
    • 1
  • Mohammad T. Jafari
    • 1
    Email author
  • Mohammad Saraji
    • 1
  1. 1.Department of ChemistryIsfahan University of TechnologyIsfahanIran

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