Antioxidant Capacities and Total Quercetin Content of Several Species of Polygonaceae in Mongolia

作者：Tseye Oidov Odbayar; Mkami Ichiho^*; Watanabe Jun; Tsushida Tojiro; Demberel Badamhkand; Kimura Toshinori; Ide Takashi

来源：Food Science and Technology Research, 2010, 16(2): 169-174.

• antioxidant capacity
• total phenolics
• DPPH
• ORAC
• total quercetin
• Mongolian Polygonaceae
• regression analysis

Antioxidant capacities (AOCs) and total phenolic (TP) content of 11 species of Polygonaceae from Mongolia were evaluated using diphenyl picrylhydrazyl radical (DPPH), oxygen radical antioxidant capacity (ORAC) and Folin-Ciocalteu (F-C) assays. Additionally, total quercetin content was determined by high performance liquid chromatography (HPLC) after acid hydrolysis. These plant extracts showed high AOCs using both DPPH (111.9-950.5 mu mol Trolox equivalent (TE) /g.dw) and ORAC assays (770.7-2307.9 mu mol TE/g.dw), and high TP contents (20.84-113.86 mg Gallic acid equivalent (GAE)/g.dw). AOCs were positively correlated with TP content (DPPH: r = 0.98; ORAC: r = 0.83). Moderate correlations were observed between AOCs and total quercetin content (DPPH: r = 0.58; ORAC: r = 0.51). These results suggest that quercetin glycosides may be one of the important contributors to AOCs of Mongolian Polygonaceae species.

• 出版日期2010-3