骏眉工艺红茶化学成分及其抗氧化活性研究

Study on the chemical constituents and antioxidant activity of black tea with Junmei technology

目的探索骏眉工艺加工的红茶化学成分特点和抗氧化活性。方法搜集了不同产区和嫩度的骏眉工艺红茶样,以及全国各产茶区的对照红茶产品,分析了茶叶中茶多酚、儿茶素、茶黄素和聚酯型儿茶素A成分的含量及其总抗氧化活性。结果骏眉工艺红茶具有较高的茶多酚、儿茶素、茶黄素、聚酯型儿茶素A(theasinensins A,TSA)含量,19个骏眉工艺红茶的茶多酚、儿茶素、茶黄素、TSA含量的均值分别为15.67%、4.50%、0.75%和0.38%,高于24个对照红茶的10.95%、1.75%、0.59%和0.21%。骏眉工艺红茶具有较高的抗氧化活性,19个骏眉工艺红茶的抗氧化活性均值比24个对照红茶均值高57.0%。结论骏眉工艺红茶较好地保留了茶叶中的茶多酚和儿茶素含量,并通过发酵过程形成了较多的茶黄素和聚酯型儿茶素A,抗氧化活性有一定优势,为后续的产品品质提升提供了理论基础。

Objective To explore the characteristics of chemical composition and antioxidant activity of Junmei technology black tea.Methods The samples of Junmei technology black tea from different producing areas and tenderness were collected,as well as the control black tea products from all tea producing areas in China,the content of tea polyphenols,catechins,theaflavins,theasinesin and total antioxidant activity were analyzed.Results Junmei technology black tea had high tea polyphenols,catechins,theaflavins and theasinensins A(TSA)content,the average values of tea polyphenols,catechins,theaflavins,and TSA content of 19 Junmei technology black tea were 15.67%,4.50%,0.75%,and 0.38%,which were higher than 24 comparison of black tea(10.95%,1.75%,0.59%and 0.21%).Junmei technology black tea had high antioxidant activity,the average value of antioxidant activities of 19 Junmei technology black tea were 57.0%higher than the average value of 24 comparisons of black tea.Conclusion Junmei technology black tea well retains the content of tea polyphenols and catechins in tea,and forms more theaflavins and theasinensins A through the fermentation process.It has certain advantages in antioxidant activity,which provides a theoretical basis for the subsequent improvement of product quality.