微波消解-电感耦合等离子体质谱法测定杏鲍菇中的24种元素

建立了杏鲍菇中24种元素电感耦合等离子体质谱(ICP-MS)测定的分析方法。样品经微波消解后用ICP-MS进行分析,用Sc,Ge,Y,In,Tb,Bi作内标校正基体干扰和漂移。24种元素加标回收率在90.1%~118.9%之间;工作曲线相关系数均大于0.999;相对标准偏差均在0.6~5.6%之内。方法具有简单、快速和准确的特点,是一种简便、快速分析杏鲍菇中无机元素的方法。

Determination of 24 Metal Elements in Pleurotus eryngii Quei by Inductively Coupled Plasma Mass Spectrometry with Microwave Digestion for Sample Preparation

A method was established to determination of 24 metal elements in Pleurotus eryngii Quei.After microwave digestion,the samples were determined directly by inductively coupled plasma mass spectrometry which used Sc,Ge,Y,In,Tb,Bi as internal standard to correct matrix interference and signal drifting.The quality of the results was proved by the recovery experiments(ranging from 90.1% to 118.9%).The linear correlative coefficient for all elements was higher than 0.999.The relative standard deviations varied from 0.6% to 5.6%(n = 11).The proposed method is fast,simple,sensitive and accurate,which can meet the demand for determining 24 metal elements in Pleurotus eryngii Quei.