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提香温度对恩施玉露茶理化品质及关键呈香成分的影响
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饶玉莹(1998-),女,硕士,研究方向:茶叶加工与综合利用,E-mail:raoyuying0216@163.com 通讯作者:龚雨顺(1974-),男,博士,教授,研究方向:茶叶加工与功能成分化学,E-mail:gongyushun@hunau.net;共同通讯作者:叶飞(1983-),男,博士,副研究员,研究方向:茶叶加工与综合利用,E-mail:yf421@163.com

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国家重点研发计划项目(2022YFD1600804);国家茶叶产业技术体系项目(CARS-19);湖北省农业农村厅科技研发项目(HBZY2023B00505);湖北省农业科技成果转化项目(2023BBB071);湖北省区域创新体系项目(2025EIA046);湖北省乡村振兴科技示范项目(2025EBA037)


Effects of Temperature on the Physicochemical Qualities and Key Aroma Components of Enshi Yulu Tea
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    摘要:

    为探讨提香温度对恩施玉露茶品质影响,采用感官审评、色差值测定、理化检测和顶空固相微萃取结合气相色谱-质谱-嗅觉技术(HS-SPME-GC-MS-O),比较提香时间15 min下不同提香温度(90、100、110、120和130 ℃)所制恩施玉露的感官得分、色泽品质、理化成分和香气品质。研究发现:随着提香温度升高,所制恩施玉露干茶色泽由绿变黄(P<0.05),茶汤和叶底的亮度提升(P<0.05);茶多酚和儿茶素含量降低(P<0.05),120 ℃提香所制恩施玉露的水溶性糖和氨基酸含量相对较高且感官评价综合得分最高;香气成分含量也相对较高,二甲硫(2.57 μg.L-1)、芳樟醇(0.55 μg.L-1)、壬醛(2.37 μg.L-1)、庚醛(0.74 μg.L-1)、己醛(0.49 μg.L-1)、(+)-柠檬烯(0.39 μg.L-1)等主要组分含量占其总香气成分含量80.52%。GC-O鉴定出香气强度值大于1的物质中有呈花香的芳樟醇、壬醛和(+)-顺式-橙花叔醇,呈甜玉米味的二甲硫以及青味的己醛、庚醛、辛醛等。综合来看,120 ℃提香有效提高了恩施玉露品质,可以作为一种提高恩施玉露品质的有效技术手段。

    Abstract:

    The aroma and quality of Enshi Yulu tea are known to be affected by temperature; thus, sensory evaluation, colorimetry, physicochemical testing, and headspace solid-phase microextraction were coupled with gas chromatography-mass spectrometry-olfactometry (HS-SPME-GC-MS-O) to examine the sensory attributes, color quality, physicochemical components, and aroma quality of tea subjected to different temperatures (90, 100, 110, 120, and 130 ℃) for a fixed duration of 15 minutes. The results indicated the increased temperature led to a change in the green color of dry Enshi Yulu tea to yellow (P<0.05), an increase in the brightness of the tea infused leaves and dregs (P<0.05), and a decrease in the polyphenol and catechin contents (P<0.05). In particular, Enshi Yulu tea that was brewed at 120 ℃ had relatively higher water-soluble sugar and amino acid contents and the highest overall sensory score and aroma component content, with dimethyl sulfide (2.57 μg•L-1), linalool (0.55 μg•L-1), nonanal (2.37 μg•L-1), heptanal (0.74 μg•L-1), hexanal (0.49 μg•L-1), and (+)-limonene (0.39 μg•L-1) accounting for 80.52% of the total. Substances with an aroma intensity value of >1 were identified by GC-O, and included floral aroma compounds such as linalool, nonanal and (+)-cis-nerolidol, the sweet corn aroma compound, dimethyl sulfide, and green aroma compounds such as hexanal, heptanal, and octanal. Overall, the aroma enhancement at 120 ℃ effectively improved the quality of the tea and may thus serve as an effective technique for enhancing the quality of Enshi Yulu tea.

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饶玉莹,桂安辉,刘盼盼,高士伟,郑鹏程,张强,叶飞,龚雨顺.提香温度对恩施玉露茶理化品质及关键呈香成分的影响[J].现代食品科技,2026,42(2):255-264.

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  • 收稿日期:2024-11-24
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  • 在线发布日期: 2026-03-19
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