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See Chinese contents: GB 31604.32-2016 GB 31604.32-2016: Food contact materials for export -- Wood materials -- Determination of sulfur dioxide
This standard specifies the determination methods for titration and colorimetry of sulfur dioxide in food contact wood (bamboo) materials. This standard applies to the determination of sulfur dioxide in wood (bamboo) chopsticks, wood (bamboo) bowls, wood (bamboo) spoons and wood (bamboo) shovels.
