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See Chinese contents: GB/T 35803-2018 GB/T 35803-2018: Determination of prohibited urocanic acid and its ethyl ester in cosmetics -- High performance liquid chromatography
This Standard specifies determination method of high performance liquid chromatography for prohibited urocanic acid and its ethyl ester in cosmetics. This Standard is applicable to determination of urocanic acid and its ethyl ester in cosmetics such as creams, liquids, lipsticks, loose powders, shampoos. The detection limit of this Standard for urocanic acid and its ethyl ester is 2 mg/kg, and the limit of quantification is 5 mg/kg.
