云南“紫娟”晒青绿茶和大叶晒青绿茶的化学成分比较研究  

Comparative Study on the Chemical Components of Yunnan ‘ZiJuan’ Sun-dried Green Tea and Daye Sun-dried Green Tea

作　　者：王秋萍[1] 龚加顺[1] 张蕙[1] 

机构地区：[1]云南农业大学食品科学技术学院,昆明650201

出　　处：《中国食品学报》2012年第1期213-220,共8页Journal of Chinese Institute Of Food Science and Technology

摘　　要：目的:比较云南特种"紫娟"晒青绿茶和常规大叶晒青绿茶的化学成分。方法:测定云南特种"紫娟"晒青绿茶和常规大叶晒青绿茶的常规成分、酚类物质及香气成分。结果:两种茶样水浸出物、总灰分、水溶性总糖、多糖、蛋白质及游离氨基酸总量差异较小,"紫娟"晒青绿茶的矿物质元素铁、锰分别是大叶晒青绿茶的1.25倍和1.15倍,大叶晒青绿茶的硫含量是"紫娟"晒青绿茶的2.83倍;"紫娟"晒青绿茶中的亮氨酸、酪氨酸和精氨酸含量高于大叶晒青绿茶;两种茶样的酚类物质差异较大。"紫娟"晒青绿茶的茶多酚、原花青素、花青素、茶褐素、总儿茶素含量分别为21.83%、20.23%、1.16%、2.38%、7.25%,较大叶晒青绿茶分别高5.03%、2.47%、1.16%、0.85%、0.88%,两者的儿茶素单体组成也有较大差异;"紫娟"晒青绿茶的挥发性物质中醇类、醛类分别比大叶晒青绿茶高5.18%和4.15%,酯类、羧酸类化合物分别比大叶晒青绿茶低3.00%和3.29%。结论:云南特种"紫娟"晒青绿茶和常规大叶晒青绿茶的化学成分差异较大。Objective： To Analyze the chemical components of Yunnan ＇ZiJuan＇ sun-dried green tea and Daye sundried green tea. Methods： The regular ingredients, phenolic constituents and aroma compounds of Yunnan specific ＇Zi- Juan＇ sun-dried green tea and regular Daye sun-dried green tea were determined. Resuhs： The total ash content, total water soluble carbohydrates, polysaecharide, protein and amino acid of these two kinds of tea were almost similar, the content of Fe and Mn minerals of ＇ZiJuan＇ sun-dried green tea were 1.25, and 1.15 times higher than regular Daye sun-dried green tea, respectively. The content of S minerals of regular Daye sun-dried green tea was 2.83 times higher than＇ZiJuan＇ sun-dried green tea, and the contents of Leucine, Tyrosine and Arginine of ＇ZiJuan＇ sun-dried green tea were higher than regular Daye sun-dried green tea. The contents of polyphenols, proanthocyanidins, anthocyanin, theabrownin and total eatechin were 21.83%,20.23%,1.16%,2.38% and 7.25%, respectively, which were 5.03%,2.47%, 1.16%,0.85% and 0.88% higher than regular Daye sun-dried green tea. The compositions of eatechin monomers of both kinds were also different. The contents of alcohols, aldehydes of aroma continents of ＇ZiJuan＇ sun-dried green tea were 5.18%, 4.15% higher, and the esters, carboxylic acid were 3.00%,3.29% lower than regular Daye sun-dried green tea. Conclusions： The results indicated that the chemical components of Yunnan ＇ZiJuan＇ sun-dried green tea and Daye sun- dried green tea were different.

关 键 词：“紫娟”晒青绿茶 常规大叶晒青绿茶 常规成分 酚类物质 香气成分 

分 类 号：S571.1[农业科学—茶叶生产加工]