原子吸收光谱法测定金银花中铅、镉、铜的含量

Effect of Atomic Absorption Spectrometry in Measuring the Contents of Lead,Cadmium and Copper in Honeysuckle

目的采用原子吸收光谱法((Atomic Absorption Spectroscopy)测定市售金银花饮片中铅、镉、铜的含量,为客观评价当前市面上零售的药材质量提供数据支持。方法样品加浓硝酸经微波消解后,用石墨炉法(GF-AAS)测定铅和镉,用火焰法(F-AAS)测定铜。结果方法的回收率分别为104.2%、105.4%、114.5%,RSD分别为1.8%、1.6%、1.8%(n=6)。结论测定样品中铅、镉、铜含量低于现行《中国药典》中的限度;该文方法简便、准确、实用性强,可用于该药材及饮片的评价性检查。

Objective To adopt the atomic absorption spectrometry to measure the contents of lead, cadmium and copper in honeysuckle and provide data support for the objective evaluation of retail medicinal material quality in the present market. Methods After the microwave resolution of samples with concentrated nitric acid, the lead and cadmium were measured by the graphite stove method （GF-AAS）, and the copper was measured by the flame method （F-AAS）. Results The recovery rates of methods were respectively 104.2%, 105.4% and 114.5% and RSD were respectively 1.8%, 1.6% and 1.8%（n=6）. Conclusion The measurement shows that the contents of lead, cadmium and copper in samples are lower than the limits in the current Chinese pharmacopoeia, and the method is simple and accurate with strong practicability, which can be used for the evaluation examination of medicinal materials and cut crude drugs.