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A highly thermal-resistant electrospun-based polyetherimide nanofibers coating for solid-phase microextraction Microextraction Techniques

Bagheri, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s00216-013-7407-y
  3. Abstract:
  4. A high-temperature-resisant solid-phase microextraction (SPME) fiber was prepared based on polyetherimide (PEI) by the electrospinning method. The PEI polymeric solution was converted to nanofibers using high voltages and directly coated on a stainless steel SPME needle. The scanning electron microscopy images of PEI coating showed fibers with diameter range of 500-650 nm with a homogeneous and smooth surface morphology. The SPME nanofibers coating was optimized for PEI percentage, electrospinning voltage, and time. The extraction efficiency of the coating was investigated for headspace SPME of some environmentally important polycyclic aromatic hydrocarbons from aqueous samples followed by gas chromatography-mass spectrometry measurement. In addition, the important extraction parameters including extraction temperature, extraction time, ionic strength, as well as desorption temperature and time were investigated and optimized. The detection limits of the method under optimized conditions ranged from 1 to 5 ng L-1 using time-scheduled selected ion monitoring mode. The relative standard deviations of the method were between 1.1 and 7.1 %, at a concentration level of 500 ng L-1. The calibration curves of polycyclic aromatic hydrocarbons showed linearity in the range of 5-1000 ng L-1. The developed method was successfully applied to real water samples and the relative recovery percentages obtained from the spiked water samples were from 84 to 98 % for all the selected analytes except for acenaphthene which was from 75 to 106 %
  5. Keywords:
  6. Polyetherimide nanofibers ; Chemical analysis ; Coatings ; Extraction ; Gas chromatography ; Ionic strength ; Optimization ; Electrospinning voltages ; Head-space solid-phase microextraction ; Microextraction techniques ; Relative standard deviations ; Scanning electron microscopy image ; Nanofiber ; Polyetherimide ; Analysis ; Chemistry ; Devices ; Electrochemistry ; Evaluation study ; Mass fragmentography ; Procedures ; Solid phase microextraction ; Water pollutant ; Gas Chromatography-Mass Spectrometry ; Polycyclic Hydrocarbons, Aromatic ; Polymers ; Solid Phase Microextraction ; Water Pollutants, Chemical
  7. Source: Analytical and Bioanalytical Chemistry ; Vol. 406, issue. 8 , March , 2014 , p. 2141-2149
  8. URL: http://link.springer.com/article/10.1007%2Fs00216-013-7407-y