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See Chinese contents: GB/T 40275-2021 GB/T 40275-2021: Textiles - Quantitative analysis of bicomponent fiber - Melting microscopy method
This Standard specifies high performance liquid chromatography (HPLC) method to determine the content of restricted preservatives - sorbic acid and benzoic acid - in toothpaste. This Standard is applicable to the determination of the content of restricted preservatives - sorbic acid and benzoic acid - in toothpaste. The method detection limit of this Standard is 0.5mg/kg.
