Fagopyrin and flavonoid contents in common, Tartary, and cymosum buckwheat

详细信息    查看全文

• 作者：Katja Stojilkovski ; Nina Ko膷evar Glava膷 ; Samo Kreft ; Ivan Kreft
• 关键词：Fagopyrum esculentum ; Fagopyrum tataricum ; Fagopyrum cymosum ; Fagopyrin ; Rutin ; Quercetin ; Phototoxic effects ; Phenolic compounds ; Food safety ; Food analysis ; Food composition
• 刊名：Journal of Food Composition and Analysis
• 出版年：December, 2013
• 年：2013
• 卷：32
• 期：2
• 页码：126-130
• 全文大小：523 K

文摘

Fagopyrin is a phototoxic substance found in buckwheat products in varying amounts. The aim of this study was to determine the fagopyrin, rutin, and quercetin contents of plant samples taken from 3 buckwheat species, namely common (Fagopyrum esculentum), Tartary (F. tataricum), and cymosum buckwheat (F. cymosum). HPLC was optimized for fagopyrin analysis using a fluorescence detector, and for other components a UV/VIS detector, while hypericin, rutin, and quercetin were used as standards. Common buckwheat leaves contained high levels of fagopyrin (322-2300 渭g g^鈭?) while even higher levels were found in other samples such as the flowers (鈮?830 渭g g^鈭?). The highest fagopyrin content (20,700 渭g g^鈭?) was found in the flowers of F. cymosum. Two cymosum samples had a high proportion of fagopyrin relative to rutin (鈭?00 渭g fagopyrin mg^鈭? rutin), whereas this proportion was lower (15-90 渭g fagopyrin mg^鈭? rutin) in other samples.