摘要
为了给普洱茶产品的产地判别提供初步的科学依据,本研究分析比较了普洱茶三个主产地(临沧市、西双版纳州以及普洱市)生产的普洱茶样品中的主要化学成分和挥发性成分含量的差异。结果表明,不同产地的普洱茶产品中的茶多酚和没食子酸的含量无显著性差异(p>0.05),而水浸出物总量、黄酮总量、游离氨基酸总量以及茶色素(茶褐素、茶红素和茶黄素)含量具有显著性差异(p<0.05)。此外,研究发现,普洱茶挥发性成分中的3,4-二甲氧基甲苯、5-甲基-1,2,3-三甲氧基-苯、橙花醇、橙花叔醇、柠檬醛、3,4,5-三甲氧基-苯甲醛、亚甲基-丁酸-二甲酯、四氢猕猴桃内酯等在不同产地普洱茶中含量存在显著性差异(p<0.05),采用主成分分析可将不同产地的普洱茶样品有效地区分。
In order to provide preliminary scientific basis for the identification of producing areas of Pu-erh tea products,the content levels of the major chemical constituents as well as the volatile compounds in Pu-erh tea products obtained from three major producing areas,i.e. Lincang city,Xishuangbanna city and Pu-erh city,were analyzed and compared in this study. Results showed that the levels of the major chemical constituents including water extracts,total flavonoids,total free amino acids,and tea pigments（theabrownins,theaflavins,thearubigins） were observed to have significant differences（p0.05） among Pu-erh teas produced in different areas, and the levels of tea polyphenols and gallic acid were found to have slight difference（ p 0. 05）.Moreover,significant differences were observed within the levels of some volatile compounds,such as 3,4-dimethoxytoluene,1,2,3-trimethoxy-5-methyl-benzene,nerol,nerolidol,citral,3,4,5-trimethoxy-benzaldehyde,dimethyl itaconate,and tetrahydroactinidiolide,among Pu-erh teas produced in different areas,and the principal components analysis could effectively separate the Pu-erh tea samples produced in different areas.
出处
《食品工业科技》
CAS
CSCD
北大核心
2016年第8期59-64,68,共7页
Science and Technology of Food Industry
基金
国家自然科学基金(31000317)
国家现代农业产业技术体系建设专项(CARS-23)
中国农业科学院创新工程(CAAS-ASTIP-2014-TRICAAS)
关键词
普洱茶
产地
化学成分
挥发性成分
差异
Pu-erh tea
producing areas
chemical constituents
volatile components
difference
