engleski

Influence of temperature and carrier ratio on fennel essential oil powder obtained by spray drying

Essential oils are volatile mixtures of compounds with characteristic flavor obtained from plant material. One of the plants rich in essential oil is fennel (Foeniculum vulgare Mill.). It is a perennial plant with a pleasant and aromatic odor, whose seeds are rich in essential oil (5-6%). Since the essential oil of fennel seeds has antimicrobial and antioxidant properties, nowadays there is a growing interest in its use in the food and pharmaceutical industries. However, its high volatility and susceptibility to oxidation in the presence of moisture, light and oxygen limit its use. Thus, encapsulation represents a suitable method to prolong the stability of essential oils and preserve their functional properties. One of the most commonly used encapsulation methods is spray drying, in which the suspension is dried in a stream of hot air with the addition of a suitable carrier to form stable powder in which flavor and aroma are preserved. Therefore, the aim of this research was to investigate the impact of temperature (120, 160 and 200 °C) and ratio of maltodextrin and β-cyclodextrin carriers (1:1, 3:1 and 1:3) on process yield, oil retention and encapsulation efficiency, and to determine the optimal conditions for producing powders with the best properties. The spray drying yield of fennel essential oil powder ranged from 60.89- 74.51%, oil retention ranged from 27.40-57.66%, and encapsulation efficiency ranged from 18.99- 42.96%. An increase in temperature increased the values of all three observed parameters, and an increase in maltodextrin content led to an increase in oil retention and encapsulation efficiency. However, the yield was highest at a higher β-cyclodextrin content. The optimal conditions for the production of powders with the best properties were a drying temperature of 200°C and a ratio of maltodextrin and β-cyclodextrin of 3:1. The application of the spray drying process for fennel essential oil encapsulation proved to be effective in producing powders with desirable properties.

fennel essential oil ; encapsulation ; spray-drying ; maltodextrin ; β-cyclodextrin

nije evidentirano