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China Surfactant Detergent & Cosmetics ›› 2019, Vol. 49 ›› Issue (3): 199-202.doi: 10.3969/j.issn.1001-1803.2019.03.012

• Analytical methods and testing • Previous Articles     Next Articles

Determination of aloin in cosmetics and its stability

Qiang ZHANG1,2,Jun CUI1,2,Hua GU1,2,Xiao-feng YU1,2,Xiao-feng SHAN1,2,Ge ZHU1,2   

  1. 1. Shanghai Resources Environment Supervision and Inspection Center, Ministry of Land and Resources, Shanghai 200072, China
    2. Shanghai Institute of Geological Survey, Shanghai 200072, China
  • Received:2018-07-09 Revised:2019-03-01 Online:2019-03-22 Published:2019-04-04

Abstract:

The effects of temperature, pH, extraction solvent and metallic ions on the stability of aloin in aloe extract were investigated by HPLC method. The content of aloin and its decomposition products in aloe cosmetics was determined by establishing a calibration curve. The samples were ultrasonically extracted by 5 mL 90% methanol solution at 30 ℃ for 20 minutes, separated on a C18 column by gradient elution using methanol, acetonitrile and 0.05% phosphoric acid as the mobile phases. Then 7 samples of cosmetics labeled aloe components were randomly selected for testing at 356 nm. The results show that one of the seven selected samples of aloe cosmetics contained aloe-emodin and chrysophanol, and one toner contained chrysophanol. And aloin or aloin degradation products were not detected in the rest.

Key words: cosmetic additive, aloin, stability, HPLC

CLC Number: 

  • TQ658