| 龙井茶特征香气成分分析及种类判别 |
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| 引用本文： | 胡西洲,彭西甜,周有祥,龚艳,夏虹,彭立军,胡定金.龙井茶特征香气成分分析及种类判别[J].分析科学学报,2017,33(3). |
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| 作者姓名： | 胡西洲 彭西甜 周有祥 龚艳 夏虹 彭立军 胡定金 |
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| 作者单位： | 湖北省农业科学院农业质量标准与检测技术研究所/农业部农产品质量安全风险评估实验室(武汉),湖北武汉,430064 |
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| 基金项目： | 公益性行业(农业)科研专项，湖北农业科技创新中心项目 |
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| 摘 要： | 采用顶空固相微萃取(HS-SPME)和气相色谱-质谱(GC-MS)联用技术分析了39份龙井茶叶中的挥发性成分,结合质谱数据库与保留指数,从24份西湖核心区龙井茶中获得了200余种挥发性化合物,这些挥发性成分中主要含有醇类、酯类、酮类、杂环类等化合物,经筛选得到26种共有组分.并采用主成分分析法(PCA)对24份西湖核心区龙井茶和15份疑似龙井茶进行了有效区分.该方法适用于茶叶的品质鉴定、真假识别、产地溯源等方面的研究,也为其他产品的挥发性成分分析提供参考.
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| 关 键 词： | 龙井茶 挥发性化合物 主成分分析 顶空固相微萃取 气相色谱-质谱 |
Determination of Characteristic Aroma Components from Longjing Tea and Cultivar Discriminant Analysis |
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| HU Xi-zhou,PENG Xi-tian,ZHOU You-xiang,GONG Yan,XIA Hong,PENG Li-jun,HU Ding-jin.Determination of Characteristic Aroma Components from Longjing Tea and Cultivar Discriminant Analysis[J].Journal of Analytical Science,2017,33(3). |
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| Authors: | HU Xi-zhou PENG Xi-tian ZHOU You-xiang GONG Yan XIA Hong PENG Li-jun HU Ding-jin |
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| Abstract: | A headspace solid phase microextraction-gas chromatography/mass spectrometry (HS SPMEGC/MS) method combined with retention index was used to analyze volatile components from 39 Longjing teas.A total of more than 200 volatile components were found in the Longjing teas,including alcohols,esters,ketones,and heterocyclic compounds,in which 26 common characteristic volatile components were screened.Principal component analysis was carried out to effectively distinguish 24 Longjing teas from West Lake district and 15 suspected Longjing teas.The method can be applied for quality analysis,authenticity identification and origin traceability of the famous tea,providing reference for the qualitative and quantitative analysis of volatile components from other products. |
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| Keywords: | Longjing tea Volatile components Principal components analysis Headspace solid phase micro-extraction GC-MS |
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