微波消解-ICP-MS法测定野生及种植红景天中的微量元素含量

摘要

[Objective] To establish a method for determining the contents of trace elements in the wild and planted Rhodiola. [Method] The inductively coupled plasms, mass spectrometer (ICP-MS) was adopted to determine and analyze several trace elements in the wild and planted Rhodiola. [Result] Under the optimum experimental conditions, the detection limit was 0.002 -0.092 ng/rnl,the relative standard deviation was among 1.87% -4.96%, and the recovery of standard addition wag 94.0% -104.5%. [Conclusion] The gross content of trace elements was higher in the wild Rhodiola than in the planted, but the contents of harmful elements such as Pb, As and Cd in wild Rhodiola were lower than that in the planted.%[目的]建立红景天提取物中微量元素含量的测定方法.[方法]利用电感耦合等离子体质谱法对野生和种植红景天中的多种微量元素进行测定和分析.[结果]在选定的试验条件下,方法的检出限为0.002 ～0.092 ng/ml；相对标准偏差在1.87％ ～4.96％之间；标准样加入回收率在94.0％～104.5％之间.[结论]野生红景天中微量元素总量明显高于种植的,但野生红景天中有害元素铅、砷和镉的含量高于种植红景天.