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Antioxidative effectiveness of some natural antioxidants in sunflower oil

  • Nedyalka V. Yanishlieva
  • Emma M. Marinova
Original Paper

Abstract

Sunflower oil has been oxidized at 25 and 100°C in the presence and in the absence of 0.01,0.02 and 0.05% 3,4-dihydroxybenzoic acid, caffeic acid, esculetin and fraxetin. 3,4-Dihydroxybenzoic acid shows no antioxidative activity at either temperature. Esculezin possesses a relatively low effectiveness at 100°C (stabilization factorF=1.3 for 0.05% esculetin), and at 25°C it does not improve the oxidative stability. Sunflower oil is more easy to stabilize at 100°C:F=3.0 for 0.05% fraxetin, andF=1.9 for 0.05% caffeic acid. Native sunflower oil is much more difficult to stabilize than are its kinetically pure triacylglycerols.

Key words

3,4-dihydroxybenzoic acid Caffeic acid Esculetin Fraxetin Sunflower oil 

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Nedyalka V. Yanishlieva
    • 1
  • Emma M. Marinova
    • 1
  1. 1.Institute of Organic Chemistry with Center of PhytochemistryBulgarian Academy of SciencesSofiaBulgaria

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