摘要
为了解老鹰茶特殊香气的成因,以17个市售老鹰茶为原料,采用顶空-固相微萃取和气相色谱-质谱联用法分析其香气成分组成,结合主成分分析、香气活性值、含量比较共同筛选确定老鹰茶的特征性香气成分。结果表明:老鹰茶的香气成分主要包括6大类:萜烯烃类61种,醇类22种,醛类15种,酮类10种,酯类4种,其他类5种,以萜烯类化合物为主;经主成分分析,筛选出α-古巴烯、α-檀香醇等20种香气成分对老鹰茶香型具有较大贡献;香气活性值与含量比较分析表明,月桂醛、β-紫罗兰酮、表蓝桉醇等38种成分对老鹰茶香气贡献较大;综合主成分分析、香气活性值、含量比较3种方法确定斯巴醇、α-波旁烯、去氢白菖烯等12种香气成分是老鹰茶特征刺激性樟香的主要成因;月桂醛、α-蒎烯、3-蒈烯、β-紫罗兰酮等17种成分为老鹰茶增添花果香、松脂香;α-檀香醇、α-古芸烯、愈创木烯等9种成分呈现老鹰茶的木香、檀香、草药香。
Hawk tea, a kind of herbal tea with a unique pungent aroma, is popular in the southwest of China for a long time. In order to identify the aroma characteristics of hawk tea, 17 samples of commercial hawk tea were analyzed using headspace solid phase micro-extraction coupled to gas chromatography-mass spectrometry(HS-SPME-GC-MS) in this study. Then the characteristic aroma components of hawk tea were identified based on odor activity values(OAVs) and a comparative quantitative analysis of the aroma components identified. For this purpose, principal component analysis(PCA)was also carried out. The results obtained were as follows: 1) 6 classes of volatiles were detected from hawk tea samples,namely 61 terpene olefins, 22 alcohols, 15 aldehydes, 10 ketones, 4 esters, and 5 other substances;with terpene olefins being predominant;2) based on the results of PCA, 20 volatile compounds including alpha-copaene, alpha-santalol were selected as the main aroma constituents of hawk tea;and 3) according to OVAs and the comparative quantitative analysis, 38 volatile compounds such as lauraldehyde, beta-ionone and epiglobulol contributed greatly to the aroma characteristics of hawk tea.Overall, 12 volatile compounds including spathulenol, alpha-bourbonene, and calamenene were responsible for the pungent camphor-like aroma of hawk tea, 17 compounds including lauraldehyde, alpha-pinene, 3-carene and beta-ionone for the flowery, fruity and rosin-like aroma, and 9 compounds including alpha-tantalol, alpha-gurjunene and alpha-guaiene for the wood, sandalwood-like and herbal aroma.
作者
张蕾
王杰
罗理勇
曾亮
ZHANG Lei;WANG Jie;LUO Liyong;ZENG Liang(College of Food Science, Southwest University, Chongqing 400715, China;Tea Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing 402160, China;Tea Research Institute, Southwest University, Chongqing 400715, China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2019年第10期220-228,共9页
Food Science
基金
中央高校基本科研业务费专项(XDJK2017B061)
重庆市社会民生科技创新专项(cstc2016shmszx80047)
关键词
老鹰茶
顶空-固相微萃取
气相色谱-质谱联用
特征性香气成分
hawk tea
headspace solid phase micro-extraction
gas chromatography-mass spectrometry
characteristic aroma components