Determination of Heavy Metal Content in Edible Fungi by Micro wave Digestion Inductively Coupled Plasma Mass Spectrometry
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.
edible fungimicrowave digestion inductively coupled plasma mass spectrometryheavy metalscontent detection
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