Abstract
In this study, different solvent types were evaluated in obtaining bioactive compounds from rhubarb (Rheum ribes) roots. Deep eutectic solvents prepared with choline chloride and lactic acid in different molar ratios (1:1, 1:2, 1:3) and water were used, as green solvents The total phenolic compounds were found to be high with deep eutectic solvent similar to the ethanol extract. The highest value is obtained with ethanol for total flavonoid compound extraction, while deep eutectic solvent comes second. For the antioxidant activity, it was determined that the most effective solvent was the deep eutectic solvent (1:3). In addition, the similarities/differences in terms of bioactive compounds (total phenolic, total flavonoid compound, antioxidant activity) of rhubarb extracts prepared using different solvents were evaluated with principal component analysis. As a result, the use of deep eutectic solvent was found to be appropriate as an alternative to organic solvents in bioactive compound extraction from rhubarb.