title: Ultra trace analysis of PAHs by designing simple injection of large amounts of analytes through the sample reconcentration on SPME fiber after magnetic solid phase extraction.
abstract: A simple solventless injection method was introduced based on the using of a solid-phase microextraction (SPME) fiber for injection of large amounts of the analytes extracted by the magnetic solid phase extraction (MSPE) procedure. The resulted extract from MSPE procedure was loaded on a G-coated SPME fiber, and then the fiber was injected into the gas chromatography (GC) injection port. This method combines the advantages of exhaustive extraction property of MSPE and the solvent-less injection of SPME to improve the sensitivity of the analysis. In addition, the analytes were re-concentrated prior to inject into the gas chromatography (GC) inlet because of the organic solvent removing from the remaining extract of MSPE technique. Injection of the large amounts of analytes was made possible by using the introduced procedure. Fourteen polycyclic aromatic hydrocarbons (PAHs) with different volatility were used as model compounds to investigate the method performance for volatile and semi-volatile compounds. The introduced method resulted in the higher enhancement factors (5097-59376), lower detection limits (0.29-3.3pgmL(-1)), and higher sensitivity for the semi-volatile compounds compared with the conventional direct injection method.
authors.affiliation: Department of Chemistry, Faculty of Science, K.N. Toosi University of Technology, Tehran, Iran.
authors.forename: Nader
authors.initials: N
authors.lastname: Khodaee
authors.affiliation: Department of Marine Living Science, Ocean Sciences Research Center, Iranian National Institute for Oceanography and Atmospheric Science, Tehran, Iran. Electronic address: mehdinia@inio.ac.ir.
authors.forename: Ali
authors.initials: A
authors.lastname: Mehdinia
authors.affiliation: Department of Chemistry, Faculty of Science, K.N. Toosi University of Technology, Tehran, Iran.
authors.forename: Reyhaneh
authors.initials: R
authors.lastname: Esfandiarnejad
authors.affiliation: Department of Chemistry, Faculty of Science, K.N. Toosi University of Technology, Tehran, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Jabbari
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000379:methods*; D057230:Limit of Detection; D008280:Magnetics; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D052616:Solid Phase Extraction; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical
keywords: Gas chromatography; Magnetic solid phase extraction; Polycyclic aromatic hydrocarbons; Solid-phase microextraction; Solventless injection