Abstract
In the present study, waste by-products of one of the popular fruit juices in the World has been valorized for its high-added value ingredients. Peels of sour cherry (Prunus cerasus L.) have been extracted by means of deep eutectic solvent (DES)-based microwave-assisted extraction (MAE). DES system contained citric acid as hydrogen bond acceptor (HBA) and ethylene glycol as hydrogen bond donor (HBD) (1/4, molar ratio). In order to optimize the MAE system Central Composite design (CCD) of Response Surface Method (RSM) has been used. The measured variables were the yields of total phenolic (TPC), total anthocyanins (TA) and cyanidin-3-glucoside. Optimum conditions were determined as 0.1 g of peel and 50 % (v/v) water contribution to the DES for the maximum reovery of TPC (16.85 mg-GAE/g-FP), TA (3.39 mg-cyn-3-glu/g-FP) and cyanidin-3-glucoside (mg/g-FP) in the MAE of sour cherry peels. The relationship between the responses was also established.
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