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A Nanocomposite Based on Polyurethane and Cu-TATAB Metal-Organic Framework as a Highly Efficient Sorbent for the Microextraction of Some Chlorinated Pesticides in the Environmental Samples

Afsordeh Lakhtaki, Amir Hossein | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56179 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Bagheri, Habib
  7. Abstract:
  8. In this research, Cu-TATAB/Polyurethane (PU) nanocomposite fibers were prepared via electrospinning method in order to increase the overall extraction efficiency. The incorporation of Cu-TATAB, as a metal organic framework (MOF), in the synthesized nanocomposite contributed to the enhanced efficiency. The prepared sorbent was implemented for the thin film microextraction (TFME) of organochlorine species and their determination was subsequently performed by gas chromatography-mass spectrometry (GC-MS). To achieve the maximum efficiency of the synthesized sorbent, the parameters of MOF percentage in nanocomposites, solvent type and volume, desorption time, solution ionic strength and extraction time were optimized. The linear dynamic range of the developed method was in the range of 0.02-700 μg L−1. The limits of detection and limits of quantification were in the range of 0.005-0.1 μg L−1 and 0.02-0.33 μg L−1, respectively while the relative standard deviations values were in the range of 3-6%. The developed method was validated for the TFME of pesticide residues in fish, soil and water samples and recovery values for the spiked samples at two concentration levels of 5 and 100 µgL-1 were found in the range of 72-110%
  9. Keywords:
  10. Nanocomposite ; Polyurethane ; Metal-Organic Framework ; Microextraction ; Thin Film Microextraction ; Pesticides Residue ; Gas Chromatography/Mass Spectrometry (GC/MS)

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