title: [Determination of 2,4-dinitrophenol by solid-phase microextraction coupled to GC/MS].
abstract: Solid-phase microextraction coupled GC/MS was investigated for the determination of 2,4-dinitrophenol in aqueous sample. Analytes were extracted by a 85 microns polyacrylate coated fiber. The fiber was then transferred into the injector of GC. Analytes were thermally desorbed and detected by GC/MS. The influences of several parameters on SPME procedure have been studied. The optimization condition was obtained: directly sampling in the water sample with the extraction period was 30 min and the desorption time 3 min at 270 degrees C. Acidification by hydrochloric acid (pH 2) and saturated salt were necessary for the best sensitivity. The precision of SPME is better than that of liquid-liquid extraction. This method is a fast, simple, and pre-concentration-free technique, which is suitable for detecting 2,4-dinitrophenol in water sample.
authors.affiliation: National Chromatographic R. & A. Center, Laboratory of Chromatography, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116011.
authors.forename: X
authors.initials: X
authors.lastname: Lu
authors.forename: X
authors.initials: X
authors.lastname: Zhao
authors.forename: F
authors.initials: F
authors.lastname: Ye
authors.forename: G
authors.initials: G
authors.lastname: Xu
mesh_terms: D019297:2,4-Dinitrophenol / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods; D004396:Coloring Agents / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D019297:2,4-Dinitrophenol