Insight into aroma dynamic changes during the whole manufacturing process of chestnut-like aroma green tea by combining GC-E-Nose, GC-IMS, and GC x GC-TOFMS
Insight into aroma dynamic changes during the whole manufacturing process of chestnut-like aroma green tea by combining GC-E-Nose, GC-IMS, and GC x GC-TOFMS
复制标题
结合GC-E-Nose、GC-IMS、GC·GC-TOFMS洞察板栗香绿茶制作全过程香气动态变化
DOI：
10.1016/j.foodchem.2022.132813
复制
发表时间：
2022-04-13
期刊：
影响因子：
8.8
通讯作者：
Jiang, Yongwen
中科院分区：
文献类型：
--
作者：
Yang, Yanqin;Qian, Michael C.;Jiang, Yongwen
加工是影响绿色茶香气品质的关键因素。采用气相色谱电子鼻（GC-E-Nose）、气相色谱-离子迁移谱（GC-IMS）和全二维气相色谱-飞行时间质谱（GC-x GC-TOFMS）技术，研究了板栗香型绿色茶加工过程中香气的动态变化。GC-IMS鉴定了33种挥发性化合物，而GC x GC-TOFMS鉴定了211种挥发性组分。干燥处理对板栗香气绿色茶的挥发性成分影响最大，促进了炒制过程中美拉德反应生成的杂环化合物和含硫化合物的生成。在干燥过程中新生成了大量的杂环化合物，如1-甲基-1H-吡咯、吡咯、甲基吡嗪、糠醛、2-乙基-5-甲基吡嗪、1-乙基-1H-吡咯-2-甲醛和3-乙酰基吡咯。本研究还验证了GC-E-Nose结合GC-IMS和GC x GC-TOFMS用于跟踪整个制造过程中绿色茶挥发性成分变化的适用性。
Processing is the crucial factor for green tea aroma quality. In this study, the aroma dynamic changes throughout the manufacturing process of chestnut-like aroma green tea were investigated with gas chromatography electronic nose (GC-E-Nose), gas chromatography-ion mobility spectrometry (GC-IMS), and comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC x GC-TOFMS). GC-IMS identified 33 volatile compounds while GC x GC-TOFMS identified 211 volatile components. Drying exerted the greatest influence on the volatile components of chestnut-like aroma green tea, and promoted the generation of heterocyclic compounds and sulfur compounds which were commonly generated via the Maillard reaction during the roasting stage. A large number of heterocyclic compounds such as 1-methyl-1H-pyrrole, pyrrole, methylpyrazine, furfural, 2-ethyl-5-methylpyrazine, 1-ethyl-1H-pyrrole-2-carboxaldehyde, and 3-acetylpyrrole were newly formed during the drying process. This study also validated the suitability of GC-E-Nose combined with GC-IMS and GC x GC-TOFMS for tracking the changes in volatile components of green tea throughout the manufacturing process.