PHYTOCHEMICAL CONTENT AND ANTIOXIDANT ACTIVITY OF AQUEOUS AND HYDRO-ETHANOLIC EXTRACTS OF Calycotome Spinosa USING CONVENTIONAL AND UNCONVENTIONAL EXTRACTION METHODS

This study was carried out to assess the main secondary metabolites contents and antioxidant activity of aqueous and hydro-ethanolic extract of Calycotome Spinosa plant using either conventional (maceration, reflux, and Soxhlet) and unconventional (Microwave-Assisted Extraction (MAE) and Ultrasound-Assisted Extraction (UAE)) methods. The highest extract yields were recorded for MAE methods in both water (18.15%) and ethanol extraction (21.37%) respectively. MAE method showed the highest rate of total phenolic compounds TPC (168.24±0.79 and 182.60±1.29 mg CE/g DR) and total flavonoids (16.38±1.17 and 28.94 ±0.67 mg CE/g DR) contents in both water and hydro-ethanol extracts respectively. While, the highest tannin content was recorded for maceration and MAE methods (18.90±2.82 and 23.01±2.20 mg CE/g DR) in aqueous and hydro-ethanolic extracts respectively. MAE method exhibited a significant ability to scavenge DPPH radical (IC50= 0.51 ± 0.39, and 0.34 ±0.48 mg/mL) in both water and hydro-ethanol respectively. We conclude that MAE was more effective as an extraction method for C. Spinosa plant which allows a good extraction yield with a high rate of secondary metabolite and a high antioxidant activity.