Abstract
Three different sorbents, Carbopack B, a carbon black, Bond Elut PPL, a functionalized polymeric resin, and HYSphere-1, a higher cross-linking polymeric resin, in a steel precolumn of 10×3 mm I.D., were compared for solid-phase extraction (SPE) of a group of pesticides and phenolic compounds in water which was on-line coupled to reversed-phase liquid chromatography and UV detection. HYSphere-1 gave a higher breakthrough volume for phenol, one of the most polar compounds studied and enabled 100 ml of water to be concentrated with no significant losses of the compounds studied (73% for phenol). Recoveries in tap water were between 67% for phenol and 86% for eight polar analytes, and detection limits were between 0.03 and 0.17 μg l −1.
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