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Electrospun polyamide-polyethylene glycol nanofibers for headspace solid-phase microextration

Bagheri, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1002/jssc.201400037
  3. Abstract:
  4. A solution of polyamide (PA) containing polyethylene glycol (PEG) as a side low-molecular-weight polymer was electrospun. After synthesizing the PA-PEG nanofibers, the constituent was subsequently removed (modified PA) and confirmed by Fourier transform infrared spectroscopy. The scanning electron microscopy images showed an average diameter of 640 and 148 nm for PA and PA-PEG coatings, respectively, while the latter coating structure was more homogeneous and porous. The extraction efficiencies of PA, PA-PEG, and the modified PA fiber coatings were assayed by headspace solid-phase microextraction of a number of chlorophenols from real water samples followed by their determination by gas chromatography with mass spectrometry. To prepare the most appropriate coatings, the amounts and the flow rate of the electrospinning solution were investigated. Various extraction parameters, such as the salt content, desorption condition, extraction temperature, and time were optimized. The limits of detection of the method were in the range of 0.8-25 ng/L, while the RSDs at two concentration levels of 200 and 80 ng/L were between 2.1 and 12.2%. The analysis of real water samples led to relative recoveries between 85 and 98% with a linearity of 8-1500 ng/L
  5. Keywords:
  6. Electrospinning ; Gas chromatography with mass spectrometry ; Polyamide-based nanofibers ; Solid-phase microextraction ; Coatings ; Extraction ; Fourier transform infrared spectroscopy ; Gas chromatography ; Mass spectrometry ; Phenols ; Polyethylene glycols ; Scanning electron microscopy ; Extraction efficiencies ; Extraction parameters ; Extraction temperatures ; Head-space solid-phase microextraction ; Low-molecular-weight polymers ; Polyethylene glycol (PEG) ; Scanning electron microscopy image ; Nanofibers ; Chlorophenol ; Copolymer ; Macrogol ; Nanofiber ; Polyamide ; Sodium chloride ; Water ; Chemical composition ; Chemical structure ; Concentration (parameters) ; Desorption ; Flow rate ; Infrared spectroscopy ; Limit of detection ; Mass fragmentography ; Material coating ; Particle size ; Porosity ; Priority journal ; Reaction time ; Temperature ; Water sampling
  7. Source: Journal of Separation Science ; Vol. 37, issue. 14 , 2014 , pp. 1880-1886 ; ISSN: 16159306
  8. URL: http://onlinelibrary.wiley.com/doi/10.1002/jssc.201400037/abstract;jsessionid=74ACBDA2D5FDE5B3E7FCDDF378A107F5.f03t03