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Red dragon fruit peel has a very high of anthocyanin content. Anthocyanin is commonly used as natural colorants in the food industry. This study was to determine the effect red dragon fruit peel extract to physicochemical quality of Pedada’s jam. Research design used was randomized complete design with 6 combination of treatments which are 100%;0%, 90%;20%, 80%;20%, 70%;30%, 60%;40% and 50%;50% of Pedada and red dragon fruit extract respectively with 4 replicates. The results shows Pedada’jam fortified with red dragon fruit extract have a significant effects on pH, moisture content, anthocyanin content, total soluble solids content, antioxidant activity and colour changed. Adding of dragon fruit peel extract 50% have the best results with pH 3,54 moisture content 28,11%, total soluble solids 33,89°Brix, colour index (L*) 49,05 green (a*) -0,30, yellow (b*) +22,09 and antioxidant activity 94,16%.

iop conference series. earth and environmental science

Study of Red Dragon Fruit Peel (Hylocereus Polyrhizus) Extract as Natural Food Colorants to Physicochemical Properties Of Pedada’s Jam as Functional Foods