摘要
采用微波消解样品，用火焰原子吸收法直接测定茶叶中的辞含量。回收率85．98％-118．62％，相对标准偏差为1．7％。方法准确、操作简便，可实现同一样品的快速测定，且最大限度地减少了对测定的干扰。微波消解作为一种样品制备方法，在茶叶样品预处理方面，避免了传统湿法消解的限制，具有传统碱式干法消解与酸浸提法无法比拟的优点。
Tea samples were digested by microwave, and then zinc was determined by atomic absorption speetrophotometry. The results showed that the average recovery with standard addition mode was 85. 98%- 118.62%. The method is accurate, simple and rapid. The interference on determination was reduced to the greatest extent. As a novel method for sample preparation, microwave digestion technique eliminated the disadvantages of traditional wet digestion to pretreat tea-leaf samples and had advantages that traditional alkali melting and acid digestion did not have.
出处
《四川环境》
2007年第1期46-48,共3页
Sichuan Environment
关键词
微波消解
火焰原子吸收光谱法
茶叶
锌
Microwave digestion
atomic absorption spectrophotometry
tea
zinc
