Background: Red fruit (Pandanus conoideus) is a source of antioxidant compound components that play an important role in scavenging free radicals. Extraction methods can affect the antioxidant activity of the red fruit extract (RFE). The dry rendering method is often used in oil extraction, but ultrasonic-assisted extraction (UAE) has not been widely explored.Objective: This study aims to compare the extraction method (conventional and modern methods) on the antioxidant activity of EBM Methods: The extraction method used is dry rendering, UAE with water and n-hexane solvents. Identification of flavonoid and phenolic content, the % yield, and DPPH free radical scavenging antioxidants activity in RFE.Results: The results showed that the % yield with dry rendering was higher than in the UAE. The three extracts showed the presence of flavonoids and phenolics based on FeCl3 and AlCl3 tests, while the highest antioxidant activity was in the dry rendering method (0.13% w/v) compared to UAE-water (0.98% w/v) and UAE-n hexane (1.47% w/v). Dry rendering can separate bioactive compounds with the highest % yield and inhibit DPPH free radicals with high temperatures, and without solvents. Conclusion: This method can indicate the potential of dry rendering as an efficient extraction method for antioxidant compounds in red fruit.
Arifah et al. (Fri,) studied this question.