Abstract
The antiradical and antioxidant properties of essential oil mixtures (EOMs) with various compositions were studied and compared in model systems of hexanal autooxidation, thermal oxidation of methyl linoleate and beta3-carotene, and in a reaction with the stable diphenylpicrylhydrazyl radical. It was found that all EOMs under investigation exhibited antiradical activity. The highest antiradical activity was observed for an EOM containing monoterpene hydrocarbons as the main components (the phenol content was low). The antioxidant activity of all EOMs was from 60 to 98% and depended on the model system composition and the method of assay. The mixture with the highest phenol content exhibits the highest antioxidant activity level in the hexanal autooxidation system. EOMs with a high content of phenols and alpha- and y-terpinenes were the most efficient antioxidants in the beta3-carotene model system. The study confirmed the possibility to vary the antioxidant and antiradical properties of essential oils by preparing their mixtures with a specific composition.
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