Abstract
To explore the effects of the roasting process on the quality of green tea used as raw materials in the industrial production of green tea beverages and to optimize the roasting process, steamed green tea was roasted using a roaster and an oven, respectively. Effects of roasting temperature, roasting time, and the dosage of additional water on the sensory quality, contents of major chemical components, and the composition of volatile components of green tea were analyzed. The roasting process of green tea using roaster and oven was optimized using the orthogonal experiment. The results showed that the odor of grass was removed from green tea and its aroma was significantly enhanced after roasting. Additionally, the astringency of green tea infusion was decreased and its taste was remarkably improved. However, the contents of tea polyphenols, free amino acids, and soluble carbohydrates showed a decreasing trend during roasting. Moreover, green tea roasted by a roaster showed a stronger aroma as well as higher contents of major chemical components and volatile compounds that contributed to the roasting aroma than those roasted by an oven, but the latter showed better infusion color and taste. The optimal quality of green tea was achieved after being roasted at 140 ℃ for 10 min via a roaster with 18% of additional water or roasted at 140 ℃ for 5 h using an oven with 15% of additional water.
Publication Date
2-18-2023
First Page
165
Last Page
171
DOI
10.13652/j.issn.1003-5788.2020.11.032
Recommended Citation
HUANG, Bin-zhang; LIN, Xiao-rong; CHEN, Zhong-zheng; ZHANG, Yuan-yuan; LIU, Xiao-hui; LUO, Long-xin; and LI, Bin
(2023)
"Effect of roasting process on the quality of tea used in green-tea beverages,"
Food and Machinery: Vol. 36:
Iss.
11, Article 32.
DOI: 10.13652/j.issn.1003-5788.2020.11.032
Available at:
https://www.ifoodmm.cn/journal/vol36/iss11/32
References
[1] 朱自振.茶的起源时间和地区[J].茶叶,1982(3):42-44.
[2] BETTUZZI S,BRAUSI M,RIZZI F,et al.Report from a one-year proof-of-principle study high-grade prostate intraepithelial neoplasia:A preliminary administration of green tea catechins in volunteers with chemoprevention of human prostate cancer by oral[J].Cancer Research,2006,66:1 234-1 240.
[3] FU Dong-he,RYAN E P,HUANG Jian-an,et al.Fermented Camellia sinensis,Fu Zhuan tea,regulates hyperlipidemia and transcription factors involved in lipid catabolism[J].Food Research International,2011,44(9):2 999-3 005.
[4] 崔锐谦.12世纪饮料——茶饮料[J].食品科学,1995,16(8):13-18.
[5] 前瞻经济学人.一文了解2020年中国茶饮料行业市场现状及竞争格局康师傅稳居第一[EB/OL].(2020-09-10)[2020-10-13].https://baijiahao.baidu.com/s?id=1677430346011436850&wfr=spider&for=pc.
[6] 罗龙新.国内外茶饮料发展现状和趋势[J].中国茶叶,2019,41(1):14-18.
[7] 刘盼盼,刘晓辉,罗龙新,等.烘焙程度对绿茶香气品质的影响[J].饮料工业,2015(5):1-7.
[8] 张凌云,王登良.不同品种原料绿茶饮料加工特性研究[J].华南农业大学学报,2006(3):103-107.
[9] 袁海波,滑金杰,邓余良,等.原料茶干燥工艺对绿茶饮料品质的影响[J].茶叶科学,2017,37(6):631-637.
[10] 尹军峰,林智,谭俊峰,等.绿茶初制工艺对饮料加工特性的影响[J].茶叶科学,2005(3):189-202.
[11] 张瑞莲.原料茶加工工艺对绿茶饮料茶汤稳定性的影响研究[D].杭州:中国农业科学院,2010:15-16.
[12] 马梦君,常睿,罗理勇,等.花香绿茶饮料的生化成分变化及物性特征[J].食品科学,2015(6):109-113.
[13] 袁海波,许勇泉,邓余良,等.两种香型原料茶饮料适制性研究[J].茶叶科学,2010(增刊1):544-550.
[14] 张俊,唐德松,龚淑英,等.烘焙处理对夏秋绿茶香气品质的影响[J].中国食品学报,2010,10(6):94-100.
[15] 李艳,何春雷,孟雪莉,等.干热后处理改善夏季成品绿茶风味品质研究[J].食品与机械,2016,32(12):189-195.
[16] FU Yan-qing,WANG Jie-qiong,CHEN Jian-xin,et al.Effect of baking on the flavor stability of green tea beverages[J].Food Chemistry,2020,331:127258.
[17] 中华人民共和国国家质量监督检验检疫总局.茶叶感官审评方法:GB/T 23776—2018[S].北京:中国标准出版社,2018:4-6.
[18] 中华人民共和国国家出入境检验检疫局.进出口茶叶水浸出物测定方法:SN/T 0920—2000[S].北京:中国标准出版社,2000:2.
[19] 中华人民共和国国家质量监督检验检疫总局.茶茶多酚测定:GB/T 8313—2002[S].北京:中国标准出版社,2002:1-2.
[20] 谌赛男,王河山,曾靖舒,等.HPLC法同时测定钩吻茎中胡蔓藤碱丙等6个生物碱的含量[J].药物分析杂志,2017,37(4):595-601.
[21] 中华人民共和国国家质量监督检验检疫总局.茶游离氨基酸总量的测定:GB/T 8314—2013[S].北京:中国标准出版社,2013:1-3.
[22] 钟萝.茶叶品质理化分析[M].上海:上海科学出版社,1989:449-450.
[23] 张凤霞.微波浸提乌龙茶饮料香气组成初探[D].广州:华南农业大学,2011:16.
[24] Leffingwell & Associates.Odor & flavor detection thresholds in water(In Parts per Billion)[EB/OL].[2020-05-10].http://www.leffingwell.com/odorthre.htm.
[25] The good scents company information system providing information for the flavor,fragrance,food and cosmetic industries[DB/OL].[2020-05-10].http://www.thegoodscentscompany.com.