没食子酸
特罗洛克
食品科学
化学
阿布茨
儿茶素
Trolox当量抗氧化能力
干重
抗氧化剂
多酚
抗氧化能力
植物
生物
生物化学
DPPH
作者
Andrew P. Breksa,Gary R. Takeoka,Marlene B. Hidalgo,Ana Vilches,Justine Vasse,David W. Ramming
出处
期刊:Food Chemistry
[Elsevier]
日期:2010-08-01
卷期号:121 (3): 740-745
被引量:86
标识
DOI:10.1016/j.foodchem.2010.01.029
摘要
Six raisin grape cultivars and 10 new raisin grape selections were analyzed for antioxidant activity (ABTS assay) and for total and individual phenolic compounds. Samples were freeze–dried and values are reported on a dry weight basis. Antioxidant activity across the 16 samples ranged from 7.7 to 60.9 μmol Trolox/g DW, with A95-27 exhibiting the greatest activity. Total phenolic content, determined in gallic acid equivalents using the Folin–Ciocalteau assay, ranged from 316.3 to 1141.3 mg gallic acid/100 g DW and was strongly correlated (r = 0.990) with antioxidant results. Concentrations of individual phenolics were determined by HPLC. trans-Caftaric acid was the predominant compound in all samples. A95-15 contained the lowest concentration (153.5 μg/g DW) of caftaric acid, while Fiesta contained the highest concentration (598.7 μg/g DW). Selections A56-66, A95-15, and A95-27 had much higher levels of catechin (86.5–209.1 μg/g DW) and epicatechin (126.5–365.7 μg/g DW) than the other samples.
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