Abstract
Abstract— A method consist of co-crystallization, agglomeration, drying has been applied to develop a powder drink from butterfly pea flower (Clitoria ternatea) extract. The butterfly pea flower extract was concentrated by vacuum evaporation and incorporated with supersaturated sugar solution (more than 90 Brix), agglomerated and dried at 60oC for 12 hours. The anthocyanin stability and antioxidant activity of the powder drink was evaluated for 28 days at three levels of temperature (room temperature, 40oC, and 50oC). The stability of anthocyanin decreased as the increase of storage temperature. The half-life of anthocyanin in the powder drink at respective temperature was 27.99, 16.53, and 9.81 days. Despite the anthocyanin significantly degraded, the decrease of antioxidant activity of the powder drink was not significant. Hence, the beneficial effect of the butterfly pea powder drink retained. 
 
 Keywords— anthocyanin; butterfly pea; co-crystallization; stability; sugar
Highlights
Pea (Clitoria ternatea), is a vine originating from South East Asia, which has spread throughout the tropics
One of the unique characteristics of butterfly pea flower is it bluish-purple at a low acidic condition, while other most anthocyanins are colorless
The raw material used for this research was butterfly pea (Clitoria Ternatea) flowers
Summary
Pea (Clitoria ternatea), is a vine originating from South East Asia, which has spread throughout the tropics. The flower has been recognized to have health benefits such as antioxidant [1], antidiabetes [2, 3], antiinflammation [4], and anticancer [5]. The bioactive compounds of butterfly pea flower are nine types of polyacylated anthocyanin called ternatins and 15 types of flavonol glucosides [6]. One of the unique characteristics of butterfly pea flower is it bluish-purple at a low acidic condition, while other most anthocyanins are colorless. The combination of the exotic color and health benefits promoted butterfly pea flower as a functional drink. In Indonesia the butterfly flower drink is much easier to be found at many restaurants
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