石墨炉原子吸收法测定粟米草中铅和镉含量的研究

Determination of Pb and Cd in Mollugo pentaphylla L.by Graphaite Furnace Atomic Absorption Spectrometry

目的运用石墨炉原子吸收光谱法测定粟米草中Pb、Cd微量元素的含量。方法通过对样品消解方法及仪器参数进行优化,建立了粟米草中Pb、Cd的石墨炉原子吸收光谱测定方法。结果重金属元素Pb、Cd的含量,分别为3.027,1.021μg.kg-1;加标回收率分别为97.25%和100.03%。结论实验建立的石墨炉原子吸收光谱条件用于测定粟米草中微量元素简单、快速、灵敏、准确,可为其他中药的Pb、Cd的测定提供参考。

The contents of Pb and Cd were determined by graphite furnace atomic absorption spectrometry （ GF - AAS）. The microwave - assisted sample digestion method and determination method for Pb and Cd in the MoUugo pentaphylla L. were established. The results indicated that the contents of Pb and Cd were 3. 027 μg · kg^- 1 （ recovery 97.25% ） and 1. 021 μg · kg^-1 （ recovery 100.03% ）respectively. The graphaite furnace atomic absorption spectrometric determination method is simple, high - speed, sensitive and accurate, which can be used to determine Pb and Cd in other traditional Chinese medicine.