清香型信阳毛尖茶关键呈香成分鉴定  

Identification of the Key Odorants in Clean Aroma-Type Xinyang Maojian Green Tea

作　　者：尹鹏 卫艺炜 王静[2] 王晓 张向娜 苏丹 王晶晶 孙慕芳 郭桂义 刘仲华[2] YIN Peng;WEI Yiwei;WANG Jing;WANG Xiao;ZHANG Xiangna;SU Dan;WANG Jingjing;SUN Mufang;GUO Guiyi;LIU Zhonghua(Henan Key Laboratory of Tea Plant Comprehensive Utilization in South Henan,College of Tea Science,Xinyang Agriculture and Forestry University,Xinyang 464000,China;Key Laboratory of Tea Science,Ministry of Education,College of Horticulture,Hunan Agricultural University,Changsha 410128,China;Xinyang Wenxin Tea Co.Ltd.,Xinyang 464000,China)

机构地区：[1]信阳农林学院茶学院,河南豫南茶树资源综合开发重点实验室,河南信阳464000 [2]湖南农业大学园艺学院,教育部茶学重点实验室,湖南长沙410128 [3]信阳市文新茶叶有限责任公司,河南信阳464000

出　　处：《食品科学》2024年第21期222-228,共7页Food Science

基　　金：河南省科技攻关项目(212102110115);信阳市科技攻关项目(20230031);“十四五”国家重点研发计划重点专项(2021YFD1601103)。

摘　　要：采用气相色谱-嗅闻-质谱结合香气活性值(odor activity value,OAV)分析清香型信阳毛尖的关键呈香成分。香气提取物稀释分析结果表明,溶剂辅助风味蒸发和顶空固相微萃取共计从信阳毛尖茶汤中得到48个呈香物质。风味稀释(flavor dilution,FD)因子≥27的呈香物质有22个,其中二氢猕猴桃内酯的FD因子最高(6561),其次是香草醛(2187)、香豆素(729)、2-苯乙醇(729)、己醛(243)、4-羟基-2,5-二甲基-3(2H)呋喃酮(243)和δ-癸内酯(243)。定量分析结合OAV结果表明,OAV>1的关键香气成分有17个,包括(E,Z)-2,6-壬二烯醛、二甲硫、3-甲基丁醛、香叶醇、反-β-紫罗酮、芳樟醇、6-甲基-5-庚烯-2-酮、(E,E)-2,4-庚二烯醛、己醛、2-甲基丁醛、茉莉酮、壬醛、δ-癸内酯、γ-己内酯、香豆素、δ-茉莉内酯和吲哚,表明这些成分对清香型信阳毛尖茶香气品质的形成有重要贡献。In this study,gas chromatography-olfactometry-mass spectrometry(GC-O-MS)combined with odor activity value(OAV)was used to analyze the key odorants of clean aroma-type Xinyang Maojian(XYMJ)green tea.The results of aroma extract dilution analysis(AEDA)showed that 48 volatile compounds were obtained from XYMJ green tea infusion by solvent-assisted flavor evaporation(SAFE)and headspace-solid phase microextraction(HS-SPME).Twenty-two volatile compounds with flavor dilution(FD)factor≥27 were identified.Among these,dihydroactinidiolide showed the highest FD factor(6561),followed by vanillin(2187),coumarin(729),2-phenylethanol(729),hexanal(243),4-hydroxy-2,5-dimethylfuran-3(2H)-one(243)andδ-decalactone(243).Through quantitative analysis,we identified 17 key odorants with OAV>1,including(E,Z)-2,6-nonadienal,dimethyl sulfide,3-methylbutanal,geraniol,(E)-β-ionone,linalool,6-methyl-5-hepten-2-one,(E,E)-2,4-heptadienal,hexanal,2-methylbutanal,jasmone,nonanal,δ-decalactone,γ-hexalactone,coumarin,δ-jasmolactone and indole.The OAV values indicate that these key odorants make important contributions to the aroma quality of clean aroma-type XYMJ green tea.

关 键 词：信阳毛尖茶 清香 风味稀释因子 香气活性值 关键呈香成分 

分 类 号：TS272.7[农业科学—茶叶生产加工]