Fly-ash samples from municipal incinerators in Canada and Norway were analyzed for polychlorinated dibenzo-p-dioxins using gas chromatography/mass spectrometry preceded by fractionation on column chromatography. Qualitative and quantitative differences in the organic compounds identified were found between the two samples. Many of the same dioxin congeners were present in both samples; however, tetrachlorodibenzo-p-dioxins were only detected in the Canadian sample.
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Viau et al. (1984) studied this question.