title: Packed-column supercritical fluid chromatography coupled with solid-phase extraction for the determination of organic microcontaminants in water.
abstract: A multiresidue method for the analysis of 35 common contaminants (including pesticides, polycyclic aromatic hydrocarbons and phenols) in lough and river waters from Castilla y León Spanish region, by using supercritical fluid chromatography (SFC) with five silica packed columns, is described. In order to decrease the detection limits, a preconcentration step by coupling solid-phase extraction to the SFC system was used. The different variables affecting the extraction procedure were studied and optimized, selecting the Isolute Env+ as the best sorbent. The detection limits achieved ranged from 0.4 to 2.6 micrograms l-1.
authors.affiliation: Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Toribio
authors.forename: M J
authors.initials: MJ
authors.lastname: del Nozal
authors.forename: J L
authors.initials: JL
authors.lastname: Bernal
authors.forename: J J
authors.initials: JJ
authors.lastname: Jiménez
authors.forename: M L
authors.initials: ML
authors.lastname: Serna
mesh_terms: D002845:Chromatography / Q000379:methods*; D004784:Environmental Monitoring; D010575:Pesticides / Q000032:analysis; D010636:Phenols / Q000032:analysis; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D015203:Reproducibility of Results; D013030:Spain; D014867:Water / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D010575:Pesticides; D010636:Phenols; D011084:Polycyclic Aromatic Hydrocarbons; D014873:Water Pollutants; D014867:Water