一、前言 氟是自然界中的一种元素,它广泛分布于矿物、土壤、空气、水和植物中。植物界中存在着高氟类、中氟类、低氟类植物,山茶科属于高氟类,茶树中的氟含量嫩叶达40～72ppm,老叶高达250～1600ppm。茶叶饮料以茶鲜叶为原料,其氟含量高低也引起关注,尤其在龋齿发病率高达60～95％的今天,开发和利用茶叶氟得到重视,因为 I. Introduction Fluorine is an element of nature, which is widely distributed in minerals, soils, air, water and plants. Plant community there is a high fluoride, fluoride, low-fluorine plants, camellia belong to high fluoride, tea leaves in the fluorine content of 40 ~ 72ppm, the old leaves up to 250 ~ 1600ppm. Tea leaves with fresh tea leaves as raw material, the level of fluorine content also caused concern, especially in the incidence of dental caries as high as 60 ~ 95% today, the development and utilization of tea fluoride attention, because