Using coconut water for polyphenol extraction from Artocarpus altilis

Tóm tắt

This study investigates the potential of coconut water for the extraction of polyphenolic compounds from the leaves and branches of Artocarpus altilis. The objective is to identify a green and clean solvent as an alternative to environmentally harmful organic solvents. Two extraction methods were used: hot extraction (reflux) and cold extraction (maceration), with three types of coconut water (Malaysian dwaft, green Siamese, and strawberry coconuts) employed as solvents. The results indicated that the total polyphenol content in the extracts obtained with coconut water and an acetate buffer (pH 3.6) was higher than that of aqueous extracts (18.8–48.0 and 15–28.0 mg GAE/g, respectively). Furthermore, 6/24 extracts exhibited significant antioxidant activity, with IC₅₀ values below 50 µg/mL in the DPPH free radical scavenging assay. Based on MPI (mobile phase performance index) values, the optimal solvent system identified was a combination of Malaysian dwarf or strawberry coconut water with a 0.5 M acetate buffer (pH 3.6) at a 1:1 ratio, which yielded high polyphenolic content and antioxidant activity from A. altilis leaves and branches.