SOLID-PHASE EXTRACTION OF PHENOLS AND PESTICIDES IN WATER WITH A MODIFIED POLYMERIC RESIN

A comparative study of a chemically modified polymeric resin which has a benzoyl group and several commercial sorbents, such as PLRP-S, Envi -chrom P and LIChrolut EN, for the solid-phase extraction of various p henolic compounds and pesticides was carried out, Selectivity and brea kthrough volumes for these compounds with different sorbents were stud ied by coupling an on-line solid-phase extraction system with a modifi ed liquid chromatograph equipped with a UV detector, After determining the chromatographic conditions, linearity range and detection limits, the method was applied to the determination of these compounds in dri nking and surface mater, For 25 ml of sample, the recovery was >70% fo r all the compounds, except for 4-nitrophenol (62%), and detection lim its were between 0.2 and 0.8 mu g l(-1).