A supercritical fluid chromatographic(SFC) method was developed for the determination of tocopherols and α-tocopheryl acetate in cosmetics.Different types of samples were sequentialy dispersed and extracted with acetonitrile water solution-hexane based on matix types.The chromatographic separation was conducted with a XBridge(Viridis@BEH,250 mm×4.6 mm,5 μm) by gradient elution using CO2 as mobile phase and 2-propanol∶hexane(1∶1) as modifier.The detection was performed with a photodiode-array(PDA) detector.The extraction procedures and chromatographic conditions were optimized.The results showed that the limits of quantitation(LOQ,S/N=10) were 50 mg/kg for four tocopherols and 25 mg/kg for α-tocopheryl acetate.The average recoveries ranged from 81.3% to 109.5% with relative standard deviations(RSDs) not more than 12.8%.The method is simple,rapid and accurate,and is suitable for the determination of four tocopherols and α-tocopheryl acetate in cosmetics.
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Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology,Guangdong Provincial Engineering Research Center for Quality and Safety of Traditional Chinese Medicine,Institute of Analysis,Guangdong Academy of Sciences(China National Analytical Center,),Guangzhou
Guangzhou Institute for Drug Control
Institute of Analysis,Guangdong Academy of Sciences(China National Analytical Center,Guangzhou),Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology,Guangdong Provincial Engineering Research Center for Quality and Safety of Traditional Chinese Medicine
Guangdong Institute for Drug Control,National Medical Products Administration Key Laboratory for Safety Risk Assessment of Cosmetics
Guangzhou Quality Supervision and Testing Institute,National Quality Supervision and Testing Center for Cosmetics(),Guangzhou