目的考察不同产地京大戟中铅(Pb)、铜(Cu)、镉(Cd)、铬(Cr)、银(Ag)和钴(Co)重金属元素的含量。方法采用湿法消解法处理样品,用石墨炉原子吸收光谱法同时测定京大戟中Pb、Cu、Cd、Cr、Ag和Co重金属元素的含量。结果 6个产地的京大戟药材均不同程度地检出重金属,Pb、Cu、Cd、Cr、Ag和Co的质量分数分别为1.7×10-7~5.1×10-7、1.1×10-5~1.4×10-5、1.2×10-7~3.5×10-7、7.6×10-6~8.5×10-6、1.5×10-8~2.6×10-8和2.0×10-7~4.0×10-7。结论该方法适用于京大戟的重金属限量控制。 Objective To investigate the contents of Pb, Cu, Cd, Cr, Ag and Co in different regions of Beijing. Methods The samples were treated by wet digestion and the contents of Pb, Cu, Cd, Cr, Ag and Co were determined simultaneously by graphite furnace atomic absorption spectrometry. Results The contents of Pb, Cu, Cd, Cr, Ag and Co in six medicinal plants of Radix Euphorbiae from different habitats were all detected in different degrees, which were 1.7 × 10-7 ~ 5.1 × 10-7, 1.1 × 10-5 To 1.4x10-5, 1.2x10-7 to 3.5x10-7, 7.6x10-6 to 8.5x10-6, 1.5x10-8 to 2.6x10-8, and 2.0x10-7 to 4.0 × 10-7. Conclusion This method is suitable for the control of heavy metals in Beijing Euphorbia.