2种紫薯化学抗氧化能力比较

摘要

以紫罗兰和秦紫一号2种紫薯为研究对象,对其基本理化指标、酚类物质含量及抗氧化能力进行了比较和相关性研究.结果表明:紫薯含有较为丰富的粗灰分、总糖和蛋白质,含量最高分别达(4.47 ±0.16)、(19.08 ±0.72)、(16.69 ±0.05) g/100 g;主要酚类物质类黄酮最高含量可达(7.38 ±0.21) mg/g;单体酚种类最高达10种,其中儿茶素的含量最高为4.54 mg/L.2种紫薯均具有较强的抗氧化能力,且紫薯中的各酚类物质均与不同的抗氧化方法有显著的相关性,其中总酚与6个抗氧化指标均极显著相关.%In this experiments,the physical and chemical components,phenolics and antioxidant activity of two kinds of purple potato(Violets and Qin Zi 1) produced in YangLing region were determined.The results showed,crude ash,protein and total sugar content of purple sweet potato were abundant,(4.47 ±0.16) g/100 g,(19.08 ± 0.72) g/100 g,(16.69 ±0.05) g/100 g respectively;flavonoids were the main phenolic compounds,the highest content was (7.38 ±0.21) mg/g;The species of mono-phenol up to 10 species,which the highest content of catechins is 4.54 mg/L.Two kinds of purple potato all had strong antioxidant activity,and the phenolic substances in purple sweet potato were significantly correlated with different antioxidant methods,and the total phenolic compounds were significantly correlated with the six antioxidant indexes.