| This study was initiated to determine the antioxidant activity of crude polyphenol extract from artichoke leaves (AE) as compared to that of commercial antioxidants propyl gallate (PG) and ascorbyl palmitate (AP). Concentrations of 200 ppm and 500 ppm polyphenols from AE, 200/100 ppm of PG/AP, 200/100 ppm of AE/AP, and 100 ppm of AP were added to 200 ml of pure canola oil. Canola oil with no added antioxidant served as the control. The treated and control canola oils were subjected to accelerated autoxidation (at 71;Analysis of variance indicated that AE, at the tested concentrations, did not exhibit any significant antioxidant properties as compared to PG and AP. Increasing the AE concentration from 200 ppm to 500 ppm polyphenols did not increase its antioxidant activity. |
