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Application of Fe3o4/Rgo Nanocomposite As a Sorbent of Pesticides Publisher



Tavakoli M1, 2 ; Hajimahmoodi M3, 4 ; Shemirani F1 ; Dezfuli AS5 ; Khanavi M6, 7
Authors
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Authors Affiliations
  1. 1. Department of Analytical Chemistry, University College of Science, University of Tehran, Tehran, Iran
  2. 2. Food and Drug Administration, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Drug and Food Control Department, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Traditional Pharmacy, School of Traditional Iranian Medicine, Tehran University of Medical Sciences, P.O. Box: 14155-6451, Tehran, Iran
  5. 5. Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran
  6. 6. Department of Pharmacognosy, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
  7. 7. Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC, Canada

Source: Chromatographia Published:2017


Abstract

Abstract: In the present study, to extract the residue of seven pesticides (diazinon, chlorpyrifos, ethion, permethrine, cypermethrin, fenvalerate RR and fenvalerate SS) from raisin samples, reduced graphene oxide—Fe3O4 magnetic nanocomposite is applied as an adsorbent and then the preconcentrated pesticides were determined by GC–MS. The application of high adsorption capacity magnetic graphene oxide sheets in pesticides solid phase extraction, provides a fast and easy procedure without filtration or centrifugation. The extraction conditions were optimized by analyzing spiked raisin samples (80 ng mL−1). The parameters affecting the performance of the extraction such as nanoparticles concentration, extraction time, solution pH and desorption conditions were investigated using a univariate optimization process. The maximum adsorption was observed within 15 min at pH 7–8 using 0.4 mg mL−1 of adsorbent with the sample ionic strength of 0.02 M NaCl. Limits of detection and quantification were about 14 and 40 µg kg−1, respectively, for all of pesticides. The validated method was successfully applied for the determination of pesticides in raisin samples. Graphical abstract: [Figure not available: see fulltext.]. © 2017, Springer-Verlag GmbH Germany.