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Using both gas chromatography low resolution mass spectrometry and gas chromatography high resolution mass spectrometry, 2,3,7,8-tetrachlorodibenzo-p-dioxin at the part per trillion level may be determined in pre-concentrated extracts of bovine fat, liver and milk; human milk; rats; rice; grass; soil and water. Criteria are set forth for the objective determination of detection limit, signal and noise as applied to these determinations.
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Shadoff et al. (1978) studied this question.
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