Encapsulation of asparagus aromas by spray drying with different carrier formulations

Asparagus juice concentrate was spray-dried using different carrierformulations. Maltodextrin was partially replaced by cellulose-based carriers,i.e. asparagus fibre, citrus fibre or microcrystalline cellulose. The maximumlevel of replacement was found to be 3 % w/w for asparagus/citrus fibre and10 % w/w for microcrystalline cellulose, due to fibre insolubility. The powdersobtained after drying 40 % w/w initial solids retained asparagus key volatile2-Methoxy-3-isopropyl pyrazine better than 30 % w/w. The partialreplacement resulted in powder with similar physical properties but slightlyreduced retention of the pyrazine. We concluded that asparagus fibre couldpotentially be used as a carrier agent