摘要
利用微波消解-电感耦合等离子体质谱仪法建立同时测定食用菌中砷(As)、铅(Pb)、镉(Cd)、铬(Cr)和汞(Hg)含量的方法.在测食用菌样品中As、Pb、Cd和Cr的质量浓度为0.5～20.0 µg·L-1,Hg的质量浓度为0.05～2.00 μg·L-1时,线性相关系数(r)均大于或等于0.999 1,检出限分别为0.001 0、0.001 0、0.002 0、0.002 0、0.000 3 mg·kg-1.其中,Pb、Cd、Cr、As 和 Hg 的加标回收率分别为 93.5％～100.0％、94.2％～98.6％、97.00％～101.4％、90.1％～99.5％和90.0％～99.5％,相对标准偏差分别为 0.86％～1.58％、0.18％～6.45％、0.39％～3.77％、0.27％～1.98％和0.39％～3.27％.说明该方法具有操作简单、重复性好、灵敏度高等优点,可以适用于食用菌中的As、Pb、Cd、Cr、Hg共5种重金属含量的分析检测.
Abstract
The test established a method for simultaneous determination of As,Pb,Cd,Cr and Hg content in edible fungi using microwave digestion inductively coupled plasma mass spectrometry.As,Pb,Cd and Cr in edible fungi at mass concentrations of 0.5-20.0 µg·L-1 and Hg at a mass concentration of 0.05-2.00 µg·L-1,the linear correlation coefficients(r)are all greater than or equal to 0.999 1,and the detection limits are 0.001 0,0.001 0,0.002 0,0.002 0,and 0.000 3 mg·kg-1,respectively.Among them,the spiked recoveries of Pb,Cd,Cr,As,and Hg are 93.5％-100.0％,94.2％-98.6％,97.00％-101.4％,90.1％-99.5％,and 90.0％-99.5％,respectively.The relative standard deviations are 0.86％-1.58％,0.18％-6.45％,0.39％-3.77％,0.27％-1.98％,and 0.39％-3.27％,respectively.Thus,this method has the advantages of simple operation,good repeatability,and high sensitiv-ity,and can be applied to the analysis and detection of As、Pb、Cd、Cr、Hg in edible fungi.
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