摘要
绿茶我国被誉为"国饮".大量科学研究证实,绿茶中的茶多酚、咖啡碱和氨基酸等具有一定的药理功效.绿茶一年有三季,分别为春茶、夏茶和秋茶,其中春茶和秋茶的口感相似,但是市场价格却相差几十倍,但是其主要成份是否有差异,并未见报导.该研究用国标法和红外光谱法分别对南京地区新鲜的春季茶和秋季绿茶样品中茶多酚、咖啡碱和氨基酸进行分析,两者的实验结果都为春季绿茶中茶多酚、咖啡碱和氨基酸的量高于秋季绿茶.
Green tea is known as the ＂national drink＂ in China. Many studies have confirmed that the contents of green tea, such as polyphenols, caffeine and free amino acids, have pharmacological effects. Green tea can be classified into three kinds： spring, summer and autumn tea. The taste of spring and autumn tea is similar, but there is a great difference between them in the market price. However, very little reference can be found regarding the difference of the contents of the spring tea and the autumn tea. In the present study, the samples of fresh spring tea and autumn tea were collected from a tea mountain located at Nanjing. Tea polyphenols, caffeine and amino acids were analyzed by the GB method and infrared spectroscopy. The results show that the amount of tea polyphenols, caffeine and the amino acids of the spring green tea is higher than those of the autumn green tea.
出处
《南京晓庄学院学报》
2012年第6期57-59,共3页
Journal of Nanjing Xiaozhuang University
基金
南京晓庄学院青年专项(2011NXY64)
南京晓庄学院应用性招标课题(2010KYZB03)
关键词
茶多酚
咖啡碱
氨基酸
红外光谱
polyphenols
caffeine
amino acids
infrared spectroscopy
