ICP-MS法测定不同采收时间宽叶荨麻中微量元素含量

采用微波消解,ICP-MS法分析不同采收时间宽叶荨麻中18种微量元素Al,Ba,Ca,Co,Cr,Cu,Fe,K,Li,Mg,Mn,Mo,Na,Ni,P,Pb,S和Zn的含量。该方法的相对标准偏差在1.2%～5.3%之间,加标回收率在95.4%～101.2%之间。结果表明宽叶荨麻中K,P,S,Ca,Na含量较高;Fe,Mg,Mn,Zn含量次之;有潜在生理毒性的元素Al,Cr,Pb的含量较低,并且在宽叶荨麻中微量元素呈现明显的季节性动态变化,此结果为进一步研究宽叶荨麻药理药效与微量元素的关系以及更好的开发这一资源提供理论数据。

Determination of trace element contents in Urtica laetevirens Maxim. reaped in different months by ICP-MS

The contents of twenty kinds of trace elements, Al, Ba, Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, S and Zn, were determined by ICP-MS with microwave digestion in Urtica laetevirens Maxim. The recovery (n=7) is 95.4%-101.2%, and the RSD (n=7) is 1.2%-5.3%. The contents of K, P, S, Ca and Na in the samples were abundant while Fe, Mg, Mn and Zn were less abundant. The contents of Al, Cr and Pb which were harmful to human were kept at low level. The contents of trace elements in Urtica laetevirens Maxim. also showed obvious seasonal dynamics. This result provides some theoretical basis for the study of internal relations between trace elements in Urtica laetevirens Maxim. and its efficacy. It's also useful for better development and utilization of the resource.