title: Determination of perfluorinated compounds in wastewater and river water samples by mixed hemimicelle-based solid-phase extraction before liquid chromatography-electrospray tandem mass spectrometry detection.
abstract: A comparative study on the use of cetyltrimethylammonium bromide (CTAB)-coated silica and sodium dodecyl sulphate (SDS)-coated alumina mixed hemimicelles-based solid-phase extraction (SPE) for the pre-concentration of six perfluorinated compounds (PFCs) in environmental water samples was presented. The six analytes heptafluorobutyric acid (HFBA), perfluoroheptanic acid (PFHeA), perfluorooctanic acid (PFOA), perfluorooctanic sulfonic (PFOS), perfluorononanic acid (PFNA) and perfluorodecanic acid (PFDeA) were quantitatively retained on both sorbent materials. The cationic surfactant (CTAB adsorbed onto silica) was more appropriate for SPE of PFCs. The main factors affecting adsolubilization of PFCs including the amount of surfactant, pH of solution, sample loading volume and desorption were investigated and optimized. Concentration factor of 500 were achieved by SPE of 500 mL of several environmental water samples. The method detection limits obtained for HFBA, PFHeA, PFOA, PFOS, PFNA and PFDeA were 0.10, 0.28, 0.07, 0.20, 0.10 and 0.05 ng/L, respectively. The relative standard deviation of recoveries ranged from 2 to 8%, which indicated good method precision.
authors.affiliation: The State Key Laboratory of Environmental Chemistry and Ecotoxicology of Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Zhao
authors.forename: Jidong
authors.initials: J
authors.lastname: Li
authors.forename: Yali
authors.initials: Y
authors.lastname: Shi
authors.forename: Yaqi
authors.initials: Y
authors.lastname: Cai
authors.forename: Shifen
authors.initials: S
authors.lastname: Mou
authors.forename: Guibin
authors.initials: G
authors.lastname: Jiang
mesh_terms: D000327:Adsorption; D002853:Chromatography, Liquid / Q000379:methods*; D004784:Environmental Monitoring / Q000379:methods; D005466:Fluorocarbons / Q000032:analysis*; D005618:Fresh Water / Q000032:analysis*; D008823:Micelles; D052616:Solid Phase Extraction / Q000379:methods*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D013501:Surface-Active Agents; D053719:Tandem Mass Spectrometry / Q000379:methods*; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D005466:Fluorocarbons; D008823:Micelles; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical