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See Chinese contents: GB 5009.35-2023 GB 5009.35-2023: National food safety standard - Determination of synthetic colour in foods
This standard specifies the liquid chromatography method for the determination of synthetic colorants in food. This standard is applicable to the determination of 11 synthetic colorants (tartrazine, new red, amaranth, indigo, ponceau 4R, sunset yellow, allura red, brilliant blue, acid red, quinoline yellow, and erythrosine) in food.
