Chlorinated hydrocarbons in seawater: Analytical method and levels in the northeastern Pacific |
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| Authors: | Edward D Scura Vance E McClure |
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| Institution: | 1. Scripps Institution of Oceanography, University of California, San Diego, La Jolla, Calif. U.S.A.;2. National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southwest Fisheries Center, La Jolla, Calif. U.S.A. |
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| Abstract: | A method is described for analyzing nanogram quantities of chlorinated hydrocarbons from 1-1 samples of seawater. Seawater samples are pumped through a copper column containing a mixture by weight of 5% activated carbon powder, 10% MgO and 85% refined diatomaceous earth. The chlorinated hydrocarbons in the seawater are adsorbed or trapped on the column and subsequently eluted with 30% benzene in acetone (v/v) for analysis by gas-liquid chromatography.This procedure was used to analyze chlorinated hydrocarbon levels in samples collected off the southern California coast. We suggest that anthropogenic chlorinated hydrocarbons can be used for the investigation of large-scale ocean currents and mixing processes. |
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