Antioxidant Properties of Laoying Tea (Litsea Coreana L.) Extracts
The petroleum ether, acetic ester, methanol and water extracts of laoying tea were prepared and their antioxidant properties were studied. At 160 µg/mL, the methanol extract showed a high reducing power of 1.206. With regard to the scavenging ability on 1,1-diphenyl-2-picrylhydrazyl radicals, extracts were effective in the order: methanol > acetic ester > water > petroleum ether extracts. EC50 values for chelating ability on ferrous ions for petroleum ether, acetic ester, methanol and water extracts were 11.76, 14.32, 6.05 and 1.02 mg/mL, respectively. Based on EC50 values, the various extracts from laoying tea were effective antioxidants.
H. F. Ji et al., "Antioxidant Properties of Laoying Tea (Litsea Coreana L.) Extracts", Advanced Materials Research, Vol. 340, pp. 209-214, 2012