Color Stability and Physical Properties of Spray-dried Butterfly Pea (Clitoria ternatea L.) Flower

Abstract

Butterfly pea (Clitoria ternatea L.) flower is potential for natural food colorant. This research determined which combination of carrier agent (maltodextrin and Arabic gum, and maltodextrin and soy protein isolate) to produce spray-dried extract powder with desired physical properties and storage stability. The combination of carrier agents investigated in this study had a significant impact on the characteristics and storage stability of spray-dried powder. Spray-dried powders generated a variety of hues, ranging from purple-blue to purple, and were very stable in storage due to copigmentation. Soy protein isolate significantly reduced caking development. Maltodextrin was discovered to have a positive influence on total anthocyanin content and degradation rate, possibly extend the shelf life. The combination of maltodextrin and soy protein isolate in ISP3 generated the best results in this study. This combination successfully produced vibrant and stable color, high pigment concentration, no caking tendency, good encapsulation efficiency, and a low anthocyanin degradation rate, which may extend shelf life.