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目的采用微波消解电感耦合等离子体质谱(ICP-MS)法测定布渣叶药材中铜(Cu)、铅(Pb)、汞(Hg)、砷(As)、镉(Cd)五种重金属的含量。方法布渣叶经微波消解后,以锗(72Ge)、铟(115In)、铋(209Bi)作为内标物质,用ICP-MS法同时测定样品中Cu、Pb、Hg、As、Cd五种重金属元素的含量。用国家一级标准物质柑橘叶(GBW10020)评价方法的准确性。结果对于所测元素,校准曲线相关系数r>0.9990回收率为97.9%～108.9%,RSD值在1.1%～11.6%。结论该方法简便、快速、灵敏度高,适合于布渣叶中五种重金属的含量测定。
OBJECTIVE To determine the contents of five heavy metals Cu, Pb, Hg, As and Cd in Clostridium mediterranei by microwave digestion and inductively coupled plasma mass spectrometry (ICP-MS) . Methods After the microwave digestion of cloth scallop leaves, five heavy metals, Cu, Pb, Hg, As and Cd, were determined by ICP-MS with germanium (72Ge), indium (115In) and bismuth (209Bi) Elemental content. The national standard citrus leaves (GBW10020) were used to evaluate the accuracy of the method. Results For the measured elements, the calibration curve correlation coefficient r> 0.9990 recovery rate of 97.9% to 108.9%, RSD value of 1.1% to 11.6%. Conclusion The method is simple, rapid and sensitive. It is suitable for the determination of five heavy metals in Cloth leaves.