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中国精品科技期刊2020
刘学艳,黄飞燕,周启武. 基于电子鼻和SPME/GC-MS技术对勐海县晒青茶的挥发性物质分析[J]. 食品工业科技,2022,43(19):84−91. doi: 10.13386/j.issn1002-0306.2021120286.
引用本文: 刘学艳,黄飞燕,周启武. 基于电子鼻和SPME/GC-MS技术对勐海县晒青茶的挥发性物质分析[J]. 食品工业科技,2022,43(19):84−91. doi: 10.13386/j.issn1002-0306.2021120286.
LIU Xueyan, HUANG Feiyan, ZHOU Qiwu. Analysis of Volatile Substances in Sun-dried Green Tea in Menghai County Based on Electronic Nose and SPME/GC-MS Technology[J]. Science and Technology of Food Industry, 2022, 43(19): 84−91. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021120286.
Citation: LIU Xueyan, HUANG Feiyan, ZHOU Qiwu. Analysis of Volatile Substances in Sun-dried Green Tea in Menghai County Based on Electronic Nose and SPME/GC-MS Technology[J]. Science and Technology of Food Industry, 2022, 43(19): 84−91. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021120286.

基于电子鼻和SPME/GC-MS技术对勐海县晒青茶的挥发性物质分析

Analysis of Volatile Substances in Sun-dried Green Tea in Menghai County Based on Electronic Nose and SPME/GC-MS Technology

  • 摘要: 为了解勐海县晒青茶的挥发性物质信息,本试验使用电子鼻和顶空固相微萃取(SPME)与气相色谱-质谱(GC-MS)联用技术对勐海县8份晒青茶样品进行挥发性物质检测。电子鼻检测结果表明:8个茶样可分为4组,其中南糯山(NN)、西定(XD)、布朗山(BL)、格朗和(GL)、章家三队(ZJ)的5份茶样为一组,而巴达(BD)、布朗山边境(BJ)、巴达章朗(ZL)分别为一组;硫化物及烃类化合物是电子鼻富集到的晒青茶样的主要挥发性物质。GC-MS结果显示:8个晒青茶样共检测到55种挥发性物质,主要以醇类(9种)、酯类(7种)、醛类(9种)、酮类(6种)、烯烃类(13种)、烷烃类(5种)、杂环类(4种)为主。醇类物质对晒青茶挥发性物质相对含量影响最大,最高为ZL茶样(64.02%),最低为BJ茶样(37.14%),主要表现在芳樟醇和植物醇两种物质上。8个晒青茶样中共有的挥发性物质合计19种,含量较高的10种分别是3种醇(芳樟醇、α-松油醇、香叶醇)、2种醛(苯乙醛、藏花醛)、2种酮(β-紫罗兰酮、植酮)、2种杂环类(顺式芳樟醇氧化物、反式芳樟醇氧化物)和1种酯(二氢猕猴桃内酯)。格朗和乡的晒青茶挥发性物质总相对含量高于南糯山乡和西定乡,主要表现在醛类物质上;布朗山乡的晒青茶优势香气物质为酮类和烷烃类;西定乡的优势香气物质为烯烃类,即不同产地的晒青茶具有不同的优势挥发性物质。

     

    Abstract: In order to understand the volatile matter information of sun-dried green tea in Menghai County, eight samples of sun-dried green tea in Menghai County were detected by electronic nose and headspace solid-phase microextraction (SPME) and gas chromatography-mass spectrometry (GC-MS). The results of electronic nose detection showed that the 8 tea samples could be divided into 4 groups, among which 5 tea samples from Nannuoshan (NN), Xiding (XD), Bulangshan (BL), Gelanghe (GL) and Zhangjiasandui (ZJ) belonged to one group, while Bada (BD), Bulangshan Border (BJ) and Bada Zhanglang (ZL) belonged to one group respectively. Sulfides and hydrocarbons were the main volatile compounds in the sun-dried green tea samples enriched by electronic nose. GC-MS results showed that 55 volatile compounds were detected in 8 sun-dried green tea samples, mainly alcohols (9 kinds), esters (7 kinds), aldehydes (9 kinds), ketones (6 kinds), alkenes (13 kinds), alkanes (5 kinds), heterocyclic (4 kinds). Alcohols had the greatest influence on the relative content of volatile substances in sun-dried green tea, the highest was ZL tea sample (64.02%), and the lowest was BJ tea sample (37.14%), which was mainly manifested in linalool and phytol. There were 19 kinds of volatile substances in 8 sun-dried green tea samples, and 10 kinds of higher content were 3 alcohols (linalool, α-terpineol, geraniol), 2 aldehydes (phenylacetaldehyde, crocinaldehyde), 2 ketones (β-ionone, phytoketone), 2 heterocyclic compounds (cis-linalool oxide, trans-linalool oxide), 1 esters (dihydroactinidiolide). The total relative content of volatile substances in sun-dried green tea in Gelanghe township was higher than that in Nannuoshan township and Xiding township, mainly in aldehydes. The dominant aroma components of sun-dried green tea in Bulangshan township were ketones and alkanes; The dominant aroma components in Xiding township were olefins, that was, sun-dried green tea from different producing areas had different dominant volatile substances.

     

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