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Molecules 2008, 13(10), 2545-2556; doi:10.3390/molecules13102545

Evaluation of the Antioxidant Activity of Syzygium cumini Leaves

1 Key Lab of Ministry of Education for Coast and Wetland Ecosystems, Xiamen 361005; P.R. China 2 Department of Biology, School of Life Sciences, Xiamen University, Xiamen 361005; P.R. China
* Author to whom correspondence should be addressed.
Received: 21 August 2008 / Revised: 10 October 2008 / Accepted: 13 October 2008 / Published: 16 October 2008
(This article belongs to the Special Issue Phenolics and Polyphenolics)
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The antioxidant activity of Syzygium cumini leaf extracts was investigated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical-scavenging and ferric-reducing antioxidant power (FRAP) assays. The methanolic extract and its four water, ethyl acetate, chloroform, and n-hexane fractions were prepared and subjected to antioxidant evaluation. The results showed that the ethyl acetate fraction had stronger antioxidant activity than the other ones. HPLC data indicated that S. cumini leaf extracts contained phenolic compounds, such as ferulic acid and catechin, responsible for their antioxidant activity. A significant linear relationship between antioxidant potency, free radical-scavenging ability and the content of phenolic compounds of leaf extracts supported this observation.
Keywords: Syzygium cumini; Antioxidant activity; Free radicals; High performance liquid chromatography Syzygium cumini; Antioxidant activity; Free radicals; High performance liquid chromatography
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ruan, Z.P.; Zhang, L.L.; Lin, Y.M. Evaluation of the Antioxidant Activity of Syzygium cumini Leaves. Molecules 2008, 13, 2545-2556.

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