GB/T 35948-2018

This standard specifies a high-performance liquid chromatography (HPLC) method for the simultaneous determination of seven paraben preservatives (including methylparaben, ethylparaben, and propylparaben) in cosmetic products. It is applied by quality control laboratories and regulatory authorities to test raw materials and finished cosmetics such as creams, lotions, and shampoos, ensuring compliance with safety limits for these preservatives. The method provides a reliable means to monitor paraben concentrations, supporting consumer safety and regulatory enforcement in the cosmetics industry.