Determination of Zn,Fe,Mn and Cu in Fruit Bodies of Six Edible Mushroom Species Using Microwave Digestion Combined with Inductively Coupled Plasma Atomic Emission Spectroscopy

Levels of Zn,Fe,Mn and Cu in fruit bodies of six edible fungi were determined using microwave digestion combined with inductively coupled plasma atomic emission spectroscopy(ICP-AES).Optimal digestion of fruit body material was achieved using a solution of 4.5 mL HNO3+4.5 mL H2O2 to treat 0.25 g tissue.Detection limits and average recovery rates for the four elements ranged between 0.77-1.54 μg/L and 91%-101%,respectively,and RSD values varied between 0.95%-7.1%.ICP-AES represents a simple,rapid and accurate method for measuring trace element levels in edible fungi.