不同品种柑橘皮中黄酮化合物含量及抗氧化性分析

比较了9个柑橘品种的柑橘皮总黄酮含量及黄酮成分,并对其清除DPPH自由基的能力和对铁离子的还原力进行了评价。结果表明:几乎所有品种间柑橘皮总黄酮含量及黄酮成分都存在显著差异(P<0.05);总黄酮含量最高和最低的品种分别为南丰橘和福建蜜柑,其总黄酮含量分别为9.68,5.28 mg/g;福建蜜柑中柚皮苷的含量较多,江西柳橙、江西脐橙、南方蜜橘和江西蜜柑中橙皮苷的含量较多。9个品种柑橘皮总黄酮含量与其还原力和清除DPPH自由基的能力之间线性无关,即总黄酮含量高的品种其抗氧化水平不一定高。

Study on the Flavonoids and Their Antioxidant Activities in Citrus Peel of Different Varieties

The total contents and components of flavonoids in 9 different citrus varieties and their DPPH radical scavenging activities and reducing powers were studied in this paper.The results showed that there were significant differences in total contents and components of flavonoids almost among all citrus varieties(P<0.05);The content of total flavonoids in NanFeng Miju was 9.68 mg/g,which was highest among all citrus varieties,while the content of total flavonoids in FuJian Migan was 5.28mg/g,which was the lowest;The content of naringin in FuJian Migan was high,while Jiangxi Liucheng,Jiangxi Qicheng,Nanfang Miju and Jiangxi Migan have a high content of hesperidin.There was no linear correlation between the contents of total flavonoids and their DPPH radical scavenging activities and reducing powers,that is,the antioxidant activity of the variety in which the content of total flavonoids was highest wasn't always strongest.The study can offer beneficial reference for establishing fingerprint of flavonoids in different citrus varieties in south China,as well as for the comprehensive utilization of citrus peel.