Abstract
Recently, there has been increasing interest in using alternative green technologies for the isolation of bioactive metabolites from medicinal plants. This study was designed to select the optimal solvent for phenolic compounds (TPC) extraction from Pistacia lentiscus L. black fruits (PBF) and the development of an experimental model by response surface methodology using ultrasound-assisted deep eutectic solvents (UAE-DES). The characterization and the antioxidant capacity of PBF phytochemicals using a multi-test system in-vitro were investigated. The highest amount of phenolic compounds (TPC: 183.95 ± 0.01 mg GAE/Gdw) was obtained using choline chloride-acetic acid solvent DES, under the optimum extraction conditions: 28.3% of water percentage, 40 °C of extraction temperature, and 18 min of extraction time. Moreover, DES extract had a more important antioxidant capacity with no significant difference compared to the control (Ascorbic acid). Furthermore, HPLC-DAD and TLC analysis indicated the presence of rutin and Cyanidin-3-glycoside in fraction number 4 after fractionation using the HP-20 diaion resin column. This extraction media has proved to be an alternative approach for the extraction of bioactive compounds as a sustainable and safe extraction media for pharmaceutical and industrial applications.
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