ANTIOXIDANT EFFECT OF EXTRACTS FROM MEDICINAL PLANTS OF THE FAMILY ERICACEAE ON THE STABILITY OF FOOD OILS AND OIL EMULSIONS DURING STORAGE
DOI:
https://doi.org/10.32782/pcsd-2021-3-6Keywords:
natural antioxidants, peroxide number of fat, storage of oilsAbstract
The aim of the study was to identify the antioxidant effect (AE) of extracts from medicinal plants of the family Ericaceae: lingonberry (Vaccinium vitis-idaea L.), buoy (Vaccinium uliginosum L.), cranberry (Oxycoccus Hill L.), blueberry (Vaccinium myrtillus L.) on the oxidative stability of food oils and oil emulsions (mayonnaise base). The object of the study was sunflower oil and an emulsion based on this oil. Oil, water and water-alcohol extracts from shoots of lingonberries, buoys, cranberries and blueberries were used to stabilize them. Peroxide number of extracts and control sample were determined to establish AE. Such studies are relevant because the antioxidant effect of phytoextracts of lingonberry, buoys, cranberry, blueberry is little studied in comparison with other members of the Ericaceae family. Determination of the degree of oxidation inhibition of sunflower oil with the addition of oil extracts showed that the extracts of blueberries and cranberries show strong AE (inhibition degree of 57% and 51%, respectively), lingonberry extract has medium AE (35%), buoy extract shows a weak AE (21%). After calculating the inhibition degree of the oxidation process of the emulsion based on sunflower oil with the addition of aqueous phytoextracts, it was found that aqueous extracts of blueberries and cranberries show average AE (41% and 36%, respectively), aqueous extracts of lingonberry and buoys have weak AE (24% and 15%, respectively). Using water-alcohol phytoextracts in sunflower oil emulsions, it was found that the inhibition degree of the oxidation process in all cases is slightly higher than when using aqueous phytoextracts, namely blueberry extract shows strong AE (53%), extracts of cranberries and lingonberry have average AE (46% and 32%, respectively), extract of buoys has weak AE (19%).
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