原子荧光光谱法测定隔山消中砷、汞、镉、铅的含量

目的 建立中药隔山消中砷、汞、镉、铅的原子荧光光谱检测方法.方法 采用原子荧光分光光度法测定隔山消中砷、汞、镉、铅4种元素的含量,并对测定方法进行方法学考察.结果 对于所测元素,标准曲线的相关系数r＞0.999 3,回收率为99.4%～102.3%,RSD＜5%,隔山消中的砷、汞、镉、铅4种重金属含量符合2005年版<中华人民共和国药典>中重金属的限量标准.结论 该方法快速、简便、准确且灵敏度高、效果满意,为隔山消中重金属含量测定提供了较好的方法.

Quantitative determination of As, Hg, Cd and Pb in Radix Cynanchi Auriculati by atomic fluorescence spectrometry

Objective To set up a quantity determination method of atomic fluorescence spectrometry for detecting four elements in Radix Cynanchi Auriculati, including arsenic (As), hydrargyrum (Hg), cadmium (Cd) and plumbum (Pb). Methods The atomic fluorospectrophotometry was used to determine the contents of As, Hg, Cd and Pb in Radix Cynanchi Auriculati, and the determination method was studied by methodology. Results The results showed that the correlative coefficient of calibration curve was as r>0.999 3, the recovery was 99.4%-102.3% and RSD<5%. The contents of the above four elements in Radix Cynanchi Auriculat accorded with the quantity limitation standard of the Pharmacopeia of the People's Republic of China (edition 2005). Conclusion The method is easy, quick, accurate with a higher sensitivity, which can be used in the quantitative determination of heavy metal elements in Radix Cynanchi Auriculat with a satisfactory result.