微波消解-电感耦合等离子体质谱同时测定三七中5种重金属含量

摘要

[目的]建立了微波消解-电感耦合等离子体质谱(ICP-MS)同时测定中药三七中5种重金属(铜、砷、镉、汞、铅)含量的方法.[方法]三七样品微波消解后经ICP-MS测定重金属元素含量.[结果]5种元素在各自线性范围内线性系数r＞0.999 5,加标回收率为92.5％～ 96.6％,6次重复性试验的相对标准偏差RSD≤4.38％.[结论]该研究建立的方法前处理简便、快速,检测准确,灵敏度高.%[Objective] A simultaneous determination method of 5 heavy metals, including Cu, As,Cd,Pb and Hg, in Panax notoginseng by ICP-MS combined with microwave digestion was established. [ Method] Sample was digested by microwave and then analyzed by ICP-MS for determination of 5 heavy metals. [ Result] The correlative coefficients of calibration curves for 5 analytes were all above 0. 999 5. The recoveries were in the range of 92. 5% - 96. 6% , and RSDs were not more than 4. 38%. [ Conclusion] The method is convenient, quick, accurate and highly sensitive for the determination of 5 heavy metals in Panax notoginseng.