Antioxidant properties in vitro and total phenolic contents in methanol extracts from medicinal plants

作者：Li Hua Bin^*; Wong Chi Chun; Cheng Ka Wing; Chen Feng

来源：LEBENSMITTEL-WISSENSCHAFT UND-TECHNOLOGIE-FOOD SCIENCE AND TECHNOLOGY, 2008, 41(3): 385-390.

DOI：10.1016/j.lwt.2007.03.011

• antioxidant capacity
• natural products
• ferric reducing antioxidant power assay
• Trolox equivalent antioxidant capacity assay

In order to find out new sources of safe and inexpensive antioxidants, the antioxidant capacities of 45 selected medicinal plants were evaluated using ferric reducing antioxidant power (FRAP) and Trolox equivalent antioxidant capacity (TEAC) assays, respectively, and the total phenolic contents of these plants were measured by the Folin-Ciocalteu method. Most of these plants were analyzed for the first time for their antioxidant activities. It was found that the plants Sargentodoxa cuneata Rehd. Et Wils, Fraxinus rhynchophylla Hance, Paeonia lactiflora Pall, Paeonia suffruticosa Andr and Scutellaria baicalensis Ceorgi possessed the highest antioxiclant capacities and thus Could be potential rich Sources of natural antioxidants. A strong correlation between TEAC values and those obtained from FRAP assay implied that antioxidants in these plants were capable of scavenging free radicals and reducing oxidants. A high correlation between antioxidant capacities and their total phenolic contents indicated that phenolic compounds were a major contributor of antioxidant activity of these plants.

• 出版日期2008
• 单位华南理工大学