陈香普洱茶的香气成分研究

选用云南省内市售的36个普洱茶样品,采用顶空-固相微萃取法(HS-SPME)富集其香气物质并用GC-MS分析香气成分;结合香气感官审评结果,研究了陈香普洱茶的香气成分组成,并比较了陈香普洱茶与其它普洱茶在香气成分上的主要差异。结果表明,通过感官审评确定了具有陈香的普洱茶样品5个;这些陈香普洱茶的香气成分以杂氧化合物和醇类为主(两种成分之和>40%),主要香气成分有1,2,3-三甲氧基苯、4-乙基-1,2-二甲氧基苯、β-萜品醇、环氧芳樟醇、芳樟醇氧化物Ⅰ、3,4-二甲氧基甲苯、1,2-二甲氧基苯、雪松醇、2,6-二叔丁基对甲苯酚、1,2,3-三甲氧基-5-甲基-苯、β-芳樟醇、1,2,4-三甲氧基苯、β-紫罗酮、α-法呢烯等;与其它普洱茶相比,陈香普洱茶中的β-芳樟醇、癸醛、壬醛、水杨酸甲酯、3,4-二甲氧基甲苯、4-乙基-1,2-二甲氧基苯以及2,6-二叔丁基对甲苯酚等成分的含量要明显高于其它普洱茶,而β-萜品醇、雪松醇、β-紫罗酮、1,2,4-三甲氧基苯、1,2-二甲氧基苯、1,2,3-三甲氧基苯以及长叶烯等明显低于其它普洱茶。

Study on the Aroma Components in Pu-erh Tea with Stale Flavor

Five Pu-erh tea samples with stale flavor were selected from 36 samples by sensory tests,and the aroma constituents of these samples were determined by HS-SPME/GC-MS.Furthermore the mainly difference in aroma constituents between Pu-erh tea with stale flavor and other Pu-erh tea samples was discussed in the paper.Results showed that the aroma constituents of Pu-erh tea with stale flavor were mainly heterocyclic oxygen compounds and alcohols,and the sum of the two mentioned above occupied 40% of the total,th...