茶叶鲜叶氟含量调查分析

Investigation and analysis of fluorine content in fresh tea leaves

为探究茶叶鲜叶氟含量情况,本研究采集了不同叶位、生长阶段、季节和地区的茶叶鲜叶,经杀青烘干处理,采用沸水浴浸泡提取氟化物,选择电极法测定氟离子,通过数据比对和分析,探究了茶叶鲜叶氟含量、变化规律和影响因素。研究表明,不同叶位鲜叶的氟含量呈线性变化规律:新芽尖<第1叶<第2叶<第3叶<第4叶;不同叶龄鲜叶氟含量整体呈线性变化规律:1芽1叶<1芽2叶<1芽3叶<1芽4叶<1芽5叶。茶叶鲜叶嫩叶氟含量低于老叶氟含量;随着叶龄的增长,茶叶鲜叶氟含量呈现上升趋势。该研究为茶叶产业发展提供参考。

In order to explore the fluorine content of fresh tea leaves,the fresh tea leaves were collected with different leaf positions,growth periods,seasons and regions,dried them,soaked them in boiling water bath to extract fluoride,and determined fluoride ions by selective electrode method.Through the comparison and analysis of data,the fluorine content,changing rules and influencing factors of fresh tea leaves were explored.The results showed that the fluorine content of fresh leaves in different leaf positions changed linearly:bud<first leaf<second leaf<third leaf<fourth leaf.The fluorine content of fresh leaves with different leaf ages changes linearly:one leaf in one bud<two leaves in one bud<three leaves in one bud<four leaves in one bud<five leaves in one bud.The fluorine content of fresh leaves was lower than that of old leaves,and it showed an upward trend with the increase of leaf age.This study provided a reference for the development of tea industry.