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Packed-column supercritical fluid chromatography coupled with solid-phase extraction for the determination of organic
L Toribio1, M J del Nozal, J L Bernal
1Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, Spain.
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.