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buta [c,d]pentalen-2-one), a chlorinated hydrocarbon pesticide, was manufactured at Hopewell, Va., from 1966-1975. Waste discharges contaminated the adjacent James River from Richmond to the Chesapeake Bay, producing adverse environmental and economic impacts (1-3).Extraction techniques have been developed for the determination of Kepone in water, using benzene (1, 4), tolueneethyl acetate (2), or ethyl ether-hexane (5) as solvents, with detection limits ranging from 20-40 ng/L (1, 2, 4, 5). However, because of insensitivity of these existing methods, concentration differences of a few parts-per-trillion (ng/L) dissolved Kepone may go undetected. Therefore, an analytical procedure was needed to quantify Kepone in water at concentrations of <20 ng/L.In addition to solvent extraction, techniques for removing organics from water have involved the use of columns packed with porous XAD polymer resins (6-10). Columns of

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