Microwave-Assisted Extraction of Phenolic Compounds from Pineapple Peel Using Deep Eutectic Solvents

Approximately half of the world’s pineapple production is marketed as a processed product, leading to generation significant quantity industrial waste, mainly composed peels, cores, and crowns. This study evaluated deep eutectic solvents (DESs) for assisted microwave extraction phenolic compounds from peels their antioxidant capacity. DESs are considered environmentally friendly characterized by low toxicity high capacity bioactive compounds. (choline chloride-glycerol choline-chloride-malic acid) were used compound compared with traditional such water, ethanol, methanol, ethanol-water (50%), methanol-water (50%). A higher concentration was achieved using choline than an solvent (7.98 mg eq gallic acid/g dry weight). In all treatments, 85%. The process variables (drying temperature, time, solvent/solid ratio) optimized solvent. It found that drying temperature 67 °C, time 87 s, ratio 60.5 mL/g allow maximizing content extract.