title: Preconcentration and determination of priority pollutant phenols in waters at trace levels using a polymeric solid-phase extraction cartridge.
abstract: A method to preconcentrate and analyse the EPA priority pollutant phenols from water samples is evaluated. Spe-ed Advanta cartridges, containing 100mg of a polymeric matrix modified with polar groups, are used in the extraction and enrichment step. Several parameters are studied in order to find the best experimental conditions to perform a solid-phase extraction process. Sample flow rate and pH appear as variables that could significantly affect the recoveries obtained. Water samples need a pH adjustment to values lower than 3 units and must be percolated through the cartridges with flow rates over 5 mL min(-1). The highest recoveries and preconcentrations are obtained using acetonitrile as the elution solvent. Sample volumes from 100 mL to 1 L with concentrations ranging from 50 to 0.5 microg L(-1) are analysed with quantitative recoveries and similar efficiencies being achieved. After establishing the best conditions, we applied the method to the analysis of spiked natural waters.
authors.affiliation: Chemistry Dept, University of Girona, Campus Montilivi, 17071 Girona, Spain.
authors.forename: Gemma
authors.initials: G
authors.lastname: Sirvent
authors.forename: Juan M
authors.initials: JM
authors.lastname: Sánchez
authors.forename: Victòria
authors.initials: V
authors.lastname: Salvadó
mesh_terms: D000166:Acridines; D001578:Benzopyrans; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D004129:Dimethylpolysiloxanes; D008401:Gas Chromatography-Mass Spectrometry; D009757:Nylons; D010636:Phenols / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis*
chemical_list: C419249:(1)benzopyrano(2,3,4-kl)acridin-3-ol; D000166:Acridines; D001578:Benzopyrans; D004129:Dimethylpolysiloxanes; D009757:Nylons; D010636:Phenols; D014873:Water Pollutants; C085707:poly(dimethylsiloxane)-polyamide copolymer