title: Determination of Aromatic Amines Using Solid-Phase Microextraction Based on an Ionic Liquid-Mediated Sol-Gel Technique.
abstract: A headspace solid-phase microextraction (HS-SPME) method was developed for isolation of monocyclic aromatic amines from water samples followed by gas chromatography-flame ionization detector (GC-FID). In this work, the effect of the presence of ionic liquid (namely, 1-hexyl-3-methyl-imidazolium hexafluorophosphate [C6MIM][PF6]) was investigated in the sol-gel coating solutions on the morphology and extraction behavior of the resulting hybrid organic-inorganic sol-gel sorbents utilized in SPME. Hydroxy-terminated poly(dimethylsiloxane) (PDMS) was used as the sol-gel active organic component for sol-gel hybrid coatings. Two different coated fibers that were prepared are PDMS and PDMS-IL ([C6MIM][PF6]) fibers. Under the optimal conditions, the method detection limits (S/N = 3) with PDMS-IL were in the range of 0.001-0.1 ng/mL and the limits of quantification (S/N = 10) between 0.005 and 0.5 ng/mL. The relative standard deviations for one fiber (n = 5) were obtained from 3.1 up to 8.5% and between fibers or batch to batch (n = 3) in the range of 5.3-10.1%. The developed method was successfully applied to real water and juice fruits samples while the relative recovery percentages obtained for the spiked water samples at 0.1 ng/mL were from 83.3 to 95.0%.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran.
authors.forename: Vajihe
authors.initials: V
authors.lastname: Abbasi
authors.affiliation: Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran asyazdi@um.ac.ir.
authors.forename: Ali
authors.initials: A
authors.lastname: Sarafraz-Yazdi
authors.affiliation: Department of Chemistry, Faculty of Sciences, Hakim Sabzevari University, Sabzevar, Iran.
authors.forename: Amirhassan
authors.initials: A
authors.lastname: Amiri
authors.affiliation: Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran.
authors.forename: Hossein
authors.initials: H
authors.lastname: Vatani
mesh_terms: D000588:Amines / Q000032:analysis*; D005782:Gels; D052578:Ionic Liquids; D052617:Solid Phase Microextraction / Q000379:methods*
chemical_list: D000588:Amines; D005782:Gels; D052578:Ionic Liquids