茶树中多环芳烃的研究进展

Study on Polycyclic Aromatic Hydrocarbons in Tea Plant

多环芳烃(Polycyclic Aromatic Hydrocarbons,PAHs)是广泛存在于环境中的数量最多的致癌物,可进入植物、动物和人体,危害生态系统和人类健康。本文介绍了多环芳烃的主要性质、来源、危害及其在茶树中的研究现状和趋势。重点阐述了茶园中多环芳烃的污染源监测、茶树对多环芳烃的吸收积累、多环芳烃在茶树各组织中的迁移和分布、对茶叶品质成分的影响,加工工艺中多环芳烃的变化以及冲泡过程中多环芳烃的浸出率等方面的内容。提出了我国茶叶生产和加工各环节中应研究和控制多环芳烃问题,以应对全球越来越严格的食品安全性要求。

Polycyclic aromatic hydrocarbons （PAHs）,a kind of carcinogens,widely spread in environment. They can be accumulated in vegetation,animals and human bodies and threaten the ecosystem and human health. In this paper,the characteristic,source and harmness of PAHs,and the related researches and tendency of PAHs in tea plant were reviewed,involving in the source analysis of PAHs in tea garden, the uptake and transportation of PAHs in tea plant, the distribution in different organs of tea plant, the influence of PAHs on the contents of main compounds in tea leaves,the content change of PAHs during tea processing,and the transfer ratio from made tea to tea infusion. To cope with more and more strict food safety standards in the world ,Counter measures should be taken to control PAHs in the future tea production.