GB/T 43777-2024 "Determination of functional component astaxanthin in cosmetics" High performance liquid chroma-tography, HPLC "describes in detail the method for the determination of astaxanthin in cosmetics using High performance liquid chroma-tography, HPLC. The standard covers the determination principle, reagents and materials, instruments and equipment, test steps, data processing, collection rate and precision. It is suitable for the quantification and detection of astaxanthin in cosmetics such as water agents, emulsions, creams and masks. The detection limit of the method is 0.15 mg/kg and the quantification limit is 0.50 mg/kg, which ensures the accurate measurement and evaluation of astaxanthin content in cosmetics.