原子吸收法对丹参中的铅和镉含量分析

Analysis the Content of Lead and Cadmium in Salvia by Atomic Absorption Spectrometry

目的:考察原子吸收法测定丹参中铅、镉重金属含量的可行性。方法:样品经微波消解处理后,采用原子吸收仪测定3批次样品中铅、镉含量。结果:经方法学检查,Cd、Pb均符合相关标准,与吸光度呈良好线性相关,相应回归方程是:Pb:y=238.23A1-345.23(r=0.9997),Cd:23.3A2-1.21(r=0.9993),各批次丹参药材的铅、镉重金属含量均合格。结论:原子吸收光谱法测定丹参药材Cd、Pb重金属含量,操作快捷、方法可靠、精密度和稳定性高,可用于测定。

Objective：To investigate the feasibility of the atomic absorption to determinate the content of lead and cadmium in Salvia.Methods：The samples were processed by microwave digestion firstly,then the content of three batches of samples＇ lead and cadmium were measured by atomic absorption.Results：After the examination,both Cd and Pb met relevant standards,and had a good linear correlation with the absorbance.The corresponding regression equation is：Pb：y=238.23A1-345.23（r=0.9997）,Cd：23.3A2-1.21（r=0.9993）.The content of lead and heavy metals cadmium in each batch samples was qualified.Conclusion：Atomic absorption spectrometry to determinate the content of Cd and Pb in Salvia is fast and reliable with high precision and stability,which can be used for measurement.