微波消解-石墨炉原子吸收法测定茶叶中的铅

Determination of lead in tea by microwave digestion graphite furnace atomic absorption spectrophotometry

目的:建立一种新的消解方法测定茶叶中的铅。方法:用微波消解石墨炉原子吸收法测定。结果:优化微波消解条件,标准曲线相关系数为0.999,相对标准偏差为1.2%,平均回收率90%～102.5%。结论:该方法准确度、精密度良好,是一种简便、快速、可行的测定茶叶中铅的方法。

Objective：To use neotype digestion device to digest tea.Methods：After microwave digestion,we determined lead in tea by graphite furnace atomic absorption method.Results：The correlation coefficient was 0.999,RSD was 1.3%,the average recovery rate of mercury was 90%-102.5%.Conclusion：The method has good accuracy and precision.It＇s a fast,simple and feasible method for analyzing tea.