紫娟红茶与汉中红茶品质比较研究

Comparative study on the quality of Zijuan black tea and Hanzhong black tea

以八月末云南紫娟红茶和汉中绿叶红茶为研究对象,通过评价与测定其感官品质、主要生化成分和香气化合物,对紫娟红茶和汉中红茶进行比较分析。结果表明:紫娟红茶外形挺直,汤色较红,气味蜜香;汉中红茶外形卷曲,汤色明亮,滋味甘醇;紫娟红茶的水浸出物、茶多酚、花青素及茶褐素含量显著高于汉中红茶,可溶性糖、茶红素含量显著低于汉中红茶,咖啡碱、茶黄素与汉中红茶相比差异不显著;紫娟红茶与汉中红茶中分别检出21种和27种游离氨基酸,总含量为3.109%和2.293%;紫娟红茶和汉中红茶中均鉴定出50种挥发性化合物,有26种化合物不同,紫娟红茶主要表现花蜜香,汉中红茶焦糖甜香浓。

Yunnan Zijuan black tea and Hanzhong black tea of green leaf at the end of August were studied. In order to compare and analyze the the quality characteristics of Zijuan black tea and Hanzhong black tea, sensory quality, main biochemical components and aroma compounds were measured. The results showed that the shape of Zijuan black tea was straight, its infusion color was reder and it smelled like honey. The shape of Hanzhong black tea was curved, its infusion color was bright and it tasted sweet. The content of water extracts, tea polyphenols, anthocyanins and theabrownin was significantly higher in Zijuan black tea while the content of soluble sugar, thearubigin significantly higher in Hanzhong black tea. There were no significant difference in the contents of caffeine, theaflavin between Zijuan black tea and Hanzhong black tea. There were 21 kinds of amino acids identified in Zijuan black tea and 27 kinds in Hanzhong black tea, the total contents（ dry weight） of Zijuan black tea is 3. 109% of and that of Hanzhong black tea is 2. 293%. There were 50 kinds of volatile compounds identified both in Zijuan black tea and Hanzhong black tea. Among them, 26 kinds of compounds were different. Zijuan black had prominent honey fragrance and Hanzhong black tea had prominent sweet caramel flavor.