不同等级福州茉莉花茶活性成分及体外抗氧化活性比较

Study on the active constituents and antioxidant activities of different grades of Fuzhou Jasmine tea

目的对比分析较不同等级福州茉莉花茶感官品质、活性分及体外抗氧化活性。方法以4个等级茉莉花茶为研究对象,采用感官审评法和仪器分析方法测定其活性成分,对比分析茶多酚、氨基酸、咖啡碱、儿茶素类组分等含量,并测试其体外抗氧化活性。结果感官评价得分随着等级的降低而降低。等级最高的“银毫”福州茉莉花茶,其茶多酚、咖啡碱含量均为最高,显著高于其他3个等级茉莉花茶(P<0.05),其体外抗氧化活性高于其他3个不同等级等茉莉花茶;4个等级茉莉花茶儿茶素总量不存在显著性差异(P>0.05)。结论4个等级茉莉花茶茶多酚含量和酚氨比差异性显著(P<0.05),体外抗氧化活性随着等级的降低而降低。研究可为茉莉花茶的品质评价和市场消费提供参考依据。

Objective To compare and analyze the sensory quality,activity and antioxidant activity in vitro of different grades of Fuzhou Jasmine tea.Methods The active components of 4 different grades of Jasmine tea were determined by sensory evaluation and instrumental analysis.The content of polyphenols,amino acids,caffeine and catechins of tea were compared and analyzed,and their antioxidant activities were tested in vitro.Results The score of sensory evaluation decreased with the decrease of grade.The highest grade of“Yinhao”Fuzhou Jasmine tea had the highest content of tea polyphenols and caffeine,which were higher than those of the other 3 grades,and the antioxidant activity in vitro was significantly higher than that of the other 3 grades(P<0.05).There were no significant differences in the content of catechins of 4 grades of jasmine tea(P>0.05).Conclusion There are significant differences in the contents of tea polyphenols and the ratio of phenol to ammonia among the 4 grades of Jasmine tea(P<0.05),and the antioxidant activity of the 4 grades of Jasmine tea decreases with the decrease of the grade.The research can provide a theoretical reference for the quality evaluation and market consumption of Jasmine tea.