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Electrospun Polyethylene Terephthalate/Graphene Nanocomposite as a New Solid-Phase Microextraction Fiber Coating for Enhanced Determination of Organochlorine Compounds

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Abstract

A new unbreakable solid-phase microextraction fiber coating based on polyethylene terephthalate/graphene nanocomposite was developed. The nanocomposite coatings were prepared by an electrospinning technique using a polyethylene terephthalate (PET) polymer solution containing the dispersed graphene on the outer surface of a stainless-steel rod. The applicability of polyethylene terephthalate/graphene nanocomposite coatings was examined by extraction of organochlorine compounds (OCs) including heptachlor epoxide, aldrin, γ-HCH, and β-HCH from aqueous samples in headspace mode. Influential parameters on extraction efficiency such as polymer concentration, the weight ratio of components, the electrospinning time, time and temperature of extraction, the salt concentration, and desorption condition were investigated. Eventually, the developed method was validated by gas chromatography micro electron capture detector (GC-µECD). At the optimum conditions, the intra-day relative standard deviations for the determination of chloro compounds in distilled water spiked at the levels of 400, 800, and 1500 ng L− 1 were 1.9–7.3% (n = 3), the limit of detection is between 5 and 30 ng L− 1, and the calibration plots cover the 100 to 5000 ng L− 1 range. Inter-day precision values obtained for three replicates measured on different days were in the range of 2.6–9.5% at concentration levels of 400, 800, and 1500 ng L− 1. The method was applied to the analysis of (spiked) water samples and relative recoveries were found to range from 81 to 106%.

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Authors and Affiliations

  1. Department of Chemistry, Sharif University of Technology, Tehran, Iran

    Hamid Najarzadegan

  2. Technology Management Department, Police Sciences and Social Studies Institute, Tehran, 19395-6516, Iran

    Ali Roostaie

  3. Analytical Chemistry Laboratories, Department of Chemistry, Islamic Azad University-Central Tehran branch, Tehran, Iran

    Shokooh Ehteshami

Authors
  1. Hamid Najarzadegan
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  2. Ali Roostaie
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  3. Shokooh Ehteshami
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Correspondence to Ali Roostaie.

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Najarzadegan, H., Roostaie, A. & Ehteshami, S. Electrospun Polyethylene Terephthalate/Graphene Nanocomposite as a New Solid-Phase Microextraction Fiber Coating for Enhanced Determination of Organochlorine Compounds. Chromatographia 81, 1413–1420 (2018). https://doi.org/10.1007/s10337-018-3583-4

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  • DOI: https://doi.org/10.1007/s10337-018-3583-4

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