title: [Determination of organic pollutants in water by off-line supercritical fluid extraction-Gas Chromatography/Infrared Spectrometry/Mass Spectrometry].
abstract: A supercritical fluid extraction (SFE) method using carbon dioxide for the determination of organic pollutants in Yellow River water was developed. In this paper, organic contaminants in 3 L Yellow River water were concentrated on 1 g GDX-301 adsorbent and then eluted from the adsorbent with supercritical CO2. The analytes extracted by SFE were collected into 1 mL alcohol collecting solvent through a SiO2 restrictor (35 cm x 50 microns i.d.). Finally, the collecting solvent was analyzed by Gas Chromatography/Infrared Spectrometry/Mass Spectrometry. The SFE conditions which were optimized for removal of the analytes from adsorbent were 20 MPa, 60 degrees C and 40 min. The extraction efficiencies of SFE were directly compared to those obtained by using 15 mL dichloromethane elution. Efficiencies of SFE under conditions of 20 MPa, 60 degrees C and 40 min were generally higher than those of solvent elution.
authors.affiliation: Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000.
authors.forename: L
authors.initials: L
authors.lastname: Ren
authors.forename: G
authors.initials: G
authors.lastname: Wang
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical