用石墨炉原子吸收光谱法测定5种不同方法消解的茶叶中铅的含量，发现不同的消解方法对茶叶中微量元素铅的测定结果影响很大，从中也探索出测量茶叶中铅最低损耗的最佳消解条件，就是采用硝酸-高氯酸微波消解方式。方法灵敏度高，加标回收率为97.94%~101.86%，适合于茶叶中铅的日常检测。%Five different methods of digestion were used to determine the content of lead in tea with graphite furnace atomic absorption spectrometry. It’s found that various digestion procedures significantly influenced the testing results. Accordingly, an optimized digestion method, microwave-assisted nitric acid-perchloric acid digestion process was determined. The experiment results show that the method has high sensitivity;the recovery is 97.94%~101.86%;the method is suitable for daily determination of trace Pb in tea.
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