石墨炉原子吸收光谱法测定中药中的铅铜

Determination of Pb,Cu in Chinese Medicine Samples by Atomic Absorption Spectrometry

目的建立原子吸收光谱法测定牛蒡、马兰、还阳参茎、还阳参根4种中药材中铅和铜含量。方法采用微波消解,石墨炉原子吸收光谱法测定4种中药材中铅和铜含量。结果方法线性关系良好,相关系数r>0.999;回收率为99.12%-101.06%和93.92%-102.70%。结论该法快速、干扰少、精密度高,能满足中药材中重金属含量的测定。

Objective： To develop atomic absorption spectrometry（ AAS） method for determination of lead（ Pb）,copper（ Cu） in four Chinese medicines（ Arctium lappa,Kalimeris indica,Crepis rigescens stem,Crepis rigescens root）. Method： After microwave digestion sample Pb,Cu were directly determined by graphite furnace atomic absorption spectrometry（ GF- AAS）. Results： All calibrationcurves showed good inearity（ r 〉0. 999） with in test ranges. The Recovery was between 93. 92%- 102. 70%. Conclusion： This method is rapidity anti- interference and sensitivity. It can be used for quality control of heavy metals in Chinese medicines.