Formulation of Rosemary Extracts through Spray-Drying Encapsulation or Emulsification

Natural, plant-derived antioxidants can be used to prolong the shelf life of food or cosmetics, as health-promoting additives. Although their extraction from plants has been extensively studied, purification and formulation processes need further research allow exploitation. In present work, rosemary extracts were obtained by successive extractions with acetone water single either an acetone:water ethanol:water mixture. The analyzed HPLC-DAD, rosmarinic acid, carnosic carnosol, several flavonoids identified quantified. aqueous mixtures organic solvents encapsulated in maltodextrin combined gum arabic a high encapsulation yield (90–100%) efficiency (97%) for acid flavonoids. extract, rich was transformed oil solution formulated emulsion. products tested over period six months, results showed retention (88%) lower (54–80%). Carnosic presented solid powder (65–70% after one month at ambient temperature) emulsion (48% 20 days storage 15 °C), while it partially carnosol.