Synergistic Effect of combined some natural and synthetic antioxidants to increase oxidative stability using DPPH test

Binary combinations of natural antioxidants, named (Tocopherols: α-, β-, γ-, δ-T), and synthetic one named (BHA, BHT, AP) were prepared and their free r adical scavenging activity were evaluated using DPP H test. Results indicate that the synergisms of the a ntioxidant pairs (synthetic: tocopherol) were diffe rent, with different synthetic antioxidants types. The combina tions of ascorbyl palmitate showed the highest syne rgetic percentage, while combinations of tocopherols with BHA and BHT showed similar values, and these percentages were in low significant importance due to their low values. The (AP: δ-T) combination shows the highest percentage of synergism (21.66%) while (BHT :γ-T3) combination was the lowest (4.57%).