微波消解-电感耦合等离子体质谱法对白英提取物中铅、镉、砷、汞、铜的测定

摘要

Objective:To establish a determination method of Pb, Cd, As, Hg, Cu in Solanum lyratum Thunb.extract by ICP-MS.Methods:The sample was degisted by microwave digestion, using ICP-MS method to determined 5 kinds of element at the same time with using Ge,In,Bi as the internal standard.Results:The standard curve correlation coefficients of determined elements were all greater than 0.999,the average rates of recovery were from 94%to 108%, and the relative standard deviation ( RSD) was from 3.5%to 8.9%.Conclusion:This method is accurate,fast,simple,and it can be used in determination of the residual amount of the heavy metal analysis and harmful elements in solanum lyratum thunb extract.%目的：建立电感耦合等离子体质谱（ICP-MS）法测定白英提取物中的铅（Pb）、镉（Cd）、砷（As）、汞（Hg）、铜（Cu）。方法：样品经过微波消解处理，分别以锗（ Ge）、铟（ In）、铋（ Bi）作为内标，采用ICP-MS法同时测定5种元素的残留量。结果：所测元素标准曲线的相关系数均r＞0.999，平均回收率为94％～108％，相对标准偏差（ RSD）为3.5％～8.9％。结论：该方法准确、快速，简便，可用于白英提取物中重金属及有害元素的残留量测定。