title: A flow injection μ-solid phase extraction system based on electrospun polyaniline nanocomposite.
abstract: In this study, a fast and sensitive flow injection μ-solid phase extraction (FI-μ-SPE) technique based on an electrospun polyaniline (PANI) nanocomposite in conjunction with gas chromatography-mass spectrometry (GC-MS) was developed. The PANI-based nanocomposite was synthesized by electrospinning of a solution containing polyvinyl alcohol (PVA)/PANI. The majority of PVA template was subsequently removed from the whole PVA/PANI nanofibers blend by exposing the electrospun nanocomposite to hot water. The homogeneity, porosity and characterization of the electrospun nanofibers were investigated by the scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectroscopy. Due to the polar-oriented nature of the prepared nanofibrous nitrogen-containing sorbent, its capability was examined by FI-μ-SPE of some selected triazines, as model compounds, from aquatic media. After optimizing the extraction conditions, the intraday relative standard deviation values for a double distilled water spiked with the selected triazines were in range of 8.9-9.5% (n=3) while the limits of detection were between 0.03-0.09 ng mL(-1). The linearity of the method was in the concentration range of 0.1-500 ng mL(-1). The proficiency of the developed method was validated by analyzing paddy, well and tap water samples and the relative recovery values were found to be in the range of 83-95% under the optimized conditions.
authors.affiliation: Environmental and Bio-Analytical Laboratories, Department of Chemistry, Sharif University of Technology, P.O. Box 11365-9516, Tehran, Iran. Electronic address: bagheri@sharif.edu.
authors.forename: Habib
authors.initials: H
authors.lastname: Bagheri
authors.affiliation: Environmental and Bio-Analytical Laboratories, Department of Chemistry, Sharif University of Technology, P.O. Box 11365-9516, Tehran, Iran.
authors.forename: Peyman
authors.initials: P
authors.lastname: Khanipour
authors.affiliation: Environmental and Bio-Analytical Laboratories, Department of Chemistry, Sharif University of Technology, P.O. Box 11365-9516, Tehran, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Roostaie
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D005618:Fresh Water / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites; D057139:Nanofibers; D052616:Solid Phase Extraction / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared; D014227:Triazines / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000814:Aniline Compounds; D014227:Triazines; D014874:Water Pollutants, Chemical; C416807:polyaniline
keywords: Electrospinning; Flow injection μ-solid phase extraction; Gas chromatography–mass spectrometry; Polyaniline; Triazines