Forty-two commonly used essential oils were investigated for the antioxidant capabilities by DPPH free-radical scavenging activity, total phenolic contents and photochemiluminescence (PCL) assay. At the concentration of 5 mg/mL, cinnamon bark (91.4 ± 0.002%), origanum (86.66 ± 0.008%) and thyme wild (52.54 ± 0.016%) were shown to own the strongest DPPH free-radical scavenging activity. Their total phenolic contents were 658.40 ± 4.383, 1107.20 ± 0.768 and 275.50 ± 0.607 (μg GAE / 5 mg essential oil), respectively. To compare with the standard reference BHA (μg/mL), their EC50 were in the order: BHA (25.11 μg/mL) < cinnamon bark (90.63 μg/mL)
Lin, C.-W.; Yu, C.-W.; Wu, S.-C.; and Yih, K.-H.
"DPPH free-radical scavenging activity, total phenolic contents and chemical composition analysis of forty-two kinds of essential oils,"
Journal of Food and Drug Analysis: Vol. 17
, Article 9.
Available at: https://doi.org/10.38212/2224-6614.2594