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See Chinese contents: GB 31604.39-2016 GB 31604.39-2016: National Food Safety Standard -- Food Contact Materials and Articles -- Determination of Polychlorobiphenyls (PCBs) in Food Contact Paper
This Standard specifies using the gas chromatography and gas chromatography-mass spectrometry to determine the polychlorobiphenyls in food contact paper. This Standard first method is gas chromatography, the second method is gas chromatography-mass spectrometry; both of which are applicable to determine 8 polychlorobiphenyls in the various food contact papers.
