Effect of photooxidation on the antioxidant activity of soybean juice with dragon fruit (Hylocereus polyhizus) extract
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Abstract
The susceptibility of high-fat content beverages to oxidation, particularly through photooxidation. This study aimed to investigate the photooxidative effects on the antioxidant activity of soy extract derived from dragon fruit skin (Hylocereus polyrhizus), with varying irradiation durations (0, 6, 12, and 24 hours). A completely randomized design (CRD) with one factor, comprising four treatments and three replications, was employed. Data were analyzed using Analysis of Variance (ANOVA), followed by Duncan's test at a 5% significance level. The findings indicated that variations in irradiation duration did not significantly affect the tested parameters. Antioxidant activity over 0 to 24 hours was measured as IC50 57.21 ppm to 77.56 ppm, peroxide values ranged from 0.67 to 1.67, free fatty acids from 0.47% to 1.30%, and aroma scores from 4.60 to 3.13. The extract from dragon fruit skin demonstrates potential as an alternative antioxidant to inhibit photooxidation.
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