基于HS-SPME-GC-MS和OAV鉴定浮梁红茶关键呈香物质

Science and Technology of Food Industry(2022)

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Abstract
为探讨浮梁红茶的挥发性香气成分组成,从中筛选其关键呈香物质.本研究采用顶空固相微萃取-气质联用(headspace-solid phase microextraction-gas chromatography-mass spectrometry,HS-SPME-GC-MS)鉴定浮梁红茶的挥发性成分,通过香气活度值(odor activity value,OAV)与主成分分析(principal component analysis,PCA)相结合筛选其关键呈香物质.结果表明,在浮梁红茶中分离鉴定出73种挥发性成分,包括醇类16种、酯类12种、碳氢化合物11种、酮类10种、醛类9种、酸类6种、杂环类6种和酚类及其衍生物3种,醇类种类和相对含量均为最高,其中,44种挥发性成分在3个浮梁红茶样品之间无显著性差异(P>0.05),29种有显著性差异(P<0.05).挥发性成分中有15种的OAV不小于1,最终筛选出柠檬醛、苯甲醇、香叶醇、α-紫罗酮、反式-橙花叔醇、香叶基丙酮、苯乙醇、水杨酸甲酯、正己醛、芳樟醇和2-甲基吡嗪等11种化合物为浮梁红茶的关键呈香物质.本研究结果为解析浮红的特征性风味品质、明确其香气物质前体与品质定向调控提供了理论基础.
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Key words
volatile components,Fuliang congou black tea,GC-MS,aroma,OAV,flavor
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