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See Chinese contents: GB 31604.22-2016 GB 31604.22-2016: Method for analysis of hygienic standard of products of foamed polystyrene for food packaging
This Standard specifies the method for determination of dichlorodifluoromethane in products of foamed polystyrene. This Standard applies to the determination of dichlorodifluoromethane in products of foamed polystyrene.
