云南水晶石榴果皮中多酚组分及抗氧化活性分析

摘要

对云南水晶石榴果皮中的多酚含量和组成进行了分析,并研究了其提取物的抗氧化活性。结果表明：云南水晶石榴果皮中多酚含量为99.60 mg/g（干重）;香豆酸、儿茶素和原儿茶酸是多酚的主要成分,含量分别为4.80、3.96和1.96 mg/g（干重）。多酚提取物的还原能力、DPPH自由基清除能力、抑制脂质体过氧化能力和清除亚硝酸盐能力较强,且与浓度显著性正相关（P〈0.01）,相关性系数（R2）在0.888 1～0.995 8。%The content and composition of the polyphenolics in crystal pomegranate peels from Yunnan province was investigated,and the antioxidant activities were determined.The results showed that the polyphenolic content in crystal pomegranate peels was 99.60 mg/g（DW）.P-coumaric acid,（＋） catechin and protocatechuic acid were the dominate components,and their contents were 4.80,3.96 and 1.96 mg/g DW,respectively.The polyphenolic extracts showed significant reducing power,DPPH-scavenging activity,lipid peroxidation inhibition ability and nitrite-scavenging capacity.The antioxidant activities of the extracts were significantly positive correlated with polyphenolic content（P0.01）,and the determination coefficient（R2） were in the range of 0.888 1~0.995 8.