Abstract
Abstract Special techniques have been found necessary for isolating PCB's from cellulose fiber-containing effluents and process streams and for determining PCB's in effluents from paper mills using recycled fiber. Sources of potential PCB loss from aqueous solutions are revealed and means of avoiding these losses are proposed. Significant amounts of PCB remained on cellulose fibers following separatory funnel extraction of a fiber-water suspension with hexane or methylene chloride-hexane. Reflux of the fibers with alcoholic KOH was necessary to remove the remaining PCBs. PCB losses due to volatilization from aqueous solution occurred during analysis, but these were minimized by working in a cool environment and covering the Sample with a layer of hexane. The presence of cellulose fibers in PCB-containing effluents enhanced the effluents' stability during storage. Chromium trioxide oxidation was found to be valuable in cleaning up extracts from paper mill effluents. Perchlorination is apt to yield misleadi...
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