通过常规浸提、酶处理浸提两种提取工艺与真空减压浓缩、水浴浓缩两种干燥工艺制备红茶茶膏,并对其理化成分、色差及感官品质进行分析。结果表明,经酶处理后利用真空减压浓缩工艺能够显著提高红茶茶膏总糖、茶红素（TR）、茶黄素（TF）、茶褐素（TB）、儿茶素等理化活性成分含量,并提高红茶茶膏感官品质。色差分析b/a值和色相角（Hab）在红茶茶膏汤色分析中能更好反映红茶茶膏汤色状况,其与感官评分相关系数较高,可作为色差分析中衡量红茶茶膏色差品质的指标之一。
The tea paste was prepared by using two different pretreatment processes (Conventional extraction, enzyme extraction) and drying methods (boiling water concentration, vacuum concentration), and its major components and active substance were analyzed and sensory quality were conducted. The results showed that the content of total soluble sugar, thearubigin, theaflavin, theabrownin, catechin in tea paste were increased significantly with the method of enzyme treatment and vacuum concentrating technology, and much higher than those tea paste manufactured by other methods. The b/a value and Hab value correlation coefficient in the enzyme treated tea paste is higher. It can better reflect the liquor color and sensory score of black tea paste, and it was regarded that it is suitable to use for black tea paste quality measurement.
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