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投稿时间:2020-01-31
投稿时间:2020-01-31
中文摘要: 利用电子鼻(electronic nose,E-nose)和顶空固相微萃取(headspace solid phase microextraction,HS-SPME)结合气相色谱-质谱联用(gas chromatography-mass spectrometry,GC-MS)对不同焙火程度的武夷岩茶挥发性成分进行分析。结果表明:电子鼻可以很好地区分不同焙火程度的武夷岩茶样品。分析结果表明:4种岩茶样品共鉴定出86种挥发性成分,其中,轻焙火样品鉴定出53种,中轻焙火的样品鉴定出44种,中焙火样品鉴定出57种,足焙火样品鉴定出70种。GC-MS结合主成分分析(principal component analysis,PCA)和偏最小二乘法(partial least squaresdiscriminant analysis,PLS-DA)表明:苯甲酸正己酯、香叶基丙酮、乙酸甲酯、2-甲基丁醛、1-戊烯-3-醇、香叶酸甲酯、1H-吡咯-2-甲醛、芳樟醇氧化物Ⅰ、3-(苯甲氧基)-1-丙醇、芳樟醇氧化物Ⅱ、对薄荷-4-烯-3-酮、2-甲氧基-5-甲基-苯胺、1-辛醇、植醇、3-甲基-1H-吲哚、8-雪松烯-13-醇等物质是区分不同焙火程度武夷岩茶的主要香气物质。
Abstract:The volatile components of 4 Wuyi rock tea with different degrees of baking were analyzed by electronic nose(E-nose)and headspace solid phase microextraction (HS-SPME)combined with gas chromatography-mass spectrometry (GC-MS).The results showed that E-nose can distinguish Wuyi rock tea samples with different baking degrees.The results of analysis showed that 86 volatile components were identified from 4 rock tea samples,including 53 in light baking,44 in medium light baking,57 in medium baking and 70 in full baking.GC-MS combined with principal component analysis(PCA)and partial least squaresdiscriminant analysis (PLS-DA)showed:n-hexyl benzoate,geranyl acetone,methyl acetate,2-methyl butyraldehyde,1-pentene-3-ol,methyl geranyl,1H-pyrrole-2-formaldehyde,linalool oxide I,3-(benzyloxy)-1-propanol,linalool oxide II,menthol-4-ene-3-one,2-methoxy-5-methyl-aniline,1-octanol,phytol,3-methyl-1H-indole,8-cedrol-13-ol and the like are the main aroma substances that distinguish Wuyi rock tea with different baking degree.
keywords: electronic nose headspace solid-phase microextraction gas chromatography-mass spectrometry baking degree Wuyi rock tea volatile components
文章编号:202020031 中图分类号: 文献标志码:
基金项目:国家自然科学基金面上项目(31671847)
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