微波消解-ICP-MS测定藏药蓝花荆芥中10种金属元素

Determination of heavy elements in Nepeta coerulescens Maxim by microwave digestion ICP-MS

目的:建立同时测定藏药蓝花荆芥中Fe、Zn、Mn、Cr等10种金属元素的分析方法。方法:采用微波消解-电感耦合等离子体质谱(ICP-MS)法,对样品进行前处理,采用外标法对金属元素的含量进行测定。结果:蓝花荆芥中Fe、Zn、Cu元素含量较高,分别为763.50、204.10和97.71mg/kg,而As、Pb、Cd等元素含量较低,均在0.09～2.53mg/kg之间。结论:该方法操作简单,准确,灵敏度高,适用于藏药材10种金属元素的含量检测。

Objective:To establish a method for simultaneous determination of the heavy elements such as Zn,Fe,Mn,Cr and so on in Nepeta coerulescens Maxim.Methods:Pre-treating the sample by ICP-MS.Determine the content of heavy elements by external standard method.Results:The content of Fe,Zn,Cu is higher,is 763.50,204.10,97.71 mg/kg.As,Pb,Cd et with low content in 0.09~2.53 mg/kg.Conclusion:This method is simple,accurate and sensitive,is suitable for the determination of 10 metalloid elements in Tibetan medicine.