Supramolecular solvent extraction of bioactives from coffee cherry pulp

Publication date: Available online 20 January 2020Source: Journal of Food EngineeringAuthor(s): Laura Sofía Torres-Valenzuela, Ana Ballesteros-Gómez, Soledad RubioAbstractThe potential of supramolecular solvents (SUPRAS) is investigated for the extraction of bioactive compounds from coffee cherry pulp, one of the major by-products generated in the coffee industry. SUPRAS made up of hexagonal inverted aggregates of octanoic acid in ethanol:water mixtures provided good extraction yields for bioactives (3.6 ± 0.3 mg caffeine g−1 and 0.9 ± 0.1 mg protocatechuic acid g−1) at a low solvent:sample ratio of 4:1 v/w and under mild operations conditions (5 min extraction at room temperature). SUPRAS-based extraction was optimized and extracts were analyzed to identify the main phenolic and alkaloid compounds. A variety of bioactives were present and extracts showed high antioxidant capacity by different assays (45% for DPPH and 91% for ABTS). Extraction efficiencies with SUPRAS were clearly superior than those obtained with organic solvents commonly used for valorization of coffee residues.
Source: Journal of Food Engineering - Category: Food Science Source Type: research