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China Surfactant Detergent & Cosmetics ›› 2019, Vol. 49 ›› Issue (10): 688-693.doi: 10.3969/j.issn.1001-1803.2019.10.010

• Analytical methods and testing • Previous Articles     Next Articles

Simultaneous determination of 19 amino acids in cosmetics byliquid chromatography-tandem mass spectrometry

ZHOU Jin-bo1,2,ZHU Zhi-jia1   

  1. 1. College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, Shanghai 201620, China
    2. Shanghai Kangmu Daily Chemical Co., Ltd., Shanghai 201702, China
  • Received:2019-03-08 Revised:2019-03-08 Online:2019-10-22 Published:2019-10-24

Abstract:

A method for the determination of 19 amino acids in cosmetics by liquid chromatography-tandem mass spectrometry with pre-column derivation was established. The samples were mixed with activated carbon and a small amount of water, heated, sonicated, centrifuged and then made up to a fixed volume with water. Then separated by Sharpsil-H C18(2.1 mm×100 mm×3 μm)column. The acetonitrile- ammonium acetate system was used as mobile phase, with gradient elution, electrospray positive ion-multiple reaction mode detection. The results show that the linear relationship is good with the concentration of amino acid in the range of 0.005-100 mg/L. The correlation coefficient was 0.991 7-0.999 9.The detection limits of 19 amino acids ranged from 1 to 15 μg/L, and the recovery rates of cosmetic samples were 83.4%-93.6%.

Key words: cosmetics, amino acid, liquid chromatography-tandem mass spectrometry, pre-column derivation, phthalaldehyde

CLC Number: 

  • TQ658