茶鲜叶中多环芳烃类化合物的分布特性研究  

Distribution Characteristics of the Polycyclic Aromatic Hydrocarbon Compounds in Tea Fresh Leaves

作　　者：胡琳玲[1] 刘遵莹 刘秋玲[1] 丰金玉 龙金花[1] 肖文军[1,2] 

机构地区：[1]湖南农业大学园艺园林学院茶学系,湖南长沙410128 [2]湖南农业大学茶学教育部重点实验室,湖南长沙410128

出　　处：《茶叶科学》2014年第6期565-571,共7页Journal of Tea Science

基　　金：国家"十二五"科技支撑计划资助项目(2012BAD33B11;2013BAD20B10)

摘　　要：利用高效液相色谱法分析了不同季节、不同茶树品种、不同部位茶鲜叶中16种多环芳烃（PAHs）的分布特性.结果表明,3个茶树品种,以政和大白茶鲜叶原料中PAHs的含量和标准偏差值最小,平均含量为126.92 μg·kg^-1,偏差值为17.59 μg·kg^-1;不同部位茶鲜叶中PAHs含量及标准偏差值表现为芽〈第二叶〈第四叶〈第六叶,芽头PAHs含量为119.13 μg·kg^-1,标准偏差值为14.36 μg·kg^-1;不同季节茶鲜叶中PAHs含量及标准偏差值呈现秋〈春〈夏的分布特性,秋季茶鲜叶中PAHs的含量为112.75 μg·kg^-1,标准偏差值为11.97 μg·kg^-1;同时茶鲜叶中16种PAHs主要以2、3环PAHs为主,占PAHs总量的80%左右,4-6环PAHs相对较少.The distribution characteristics of 16 Polycyclic Aromatic Hydrocarbon（PAHs） in different fresh tea leaves of different tea cultivars in different seasons were analyzed by using HPLC. Results showed that Zhenghedabaicha has lowest concentration of 16 PAHs and lowest standard deviation between Zhenghedabai, Taoyuandaye and Xiangfeicui, the average content is 126.92 μg·kg^-1, the standard deviation is 17.59 μg·kg^-1, the concentration of 16 PAHs and standard deviation in different part of tea leaves is expressed as： the bud〈 the second leaf〈 the fourth leaf〈 the sixth leaf, the PAHs′ concentration in bud is 119.13 μg·kg^-1, standard deviation is 14.36 μg·kg^-1. The concentration of 16 PAHs in different seasons is expressed as autumn〈spring〈summer in one year. The concentration of PAHs in autumn is 112.75 μg·kg^-1, standard deviation is 11.97 μg·kg^-1, 16 PAHs in fresh tea leaves are mainly composed of 2, 3 rings, account for about 80%. The proportion of 4-6 rings PAHs is lower.

关 键 词：茶鲜叶 多环芳烃类化合物 分布特性 

分 类 号：S571.1[农业科学—茶叶生产加工] O614.231[农业科学—作物学]