Heavy Metal Contents of Five Kinds in Boletaceae Collected in Xichang City and the Safety Evaluation

In the study heavy metal contents (Cd, Pb, Cu, Zn, Hg) of five kinds of Boletus collected in Xichang city in Sichuan Province had been analyzed, and the content difference and food safety had also been analyzed preliminarily. Result showed that among the five kinds of boletus, the contents of Cd and Pb in Boletus griseus were the highest, which were 19.00 mg•kg-1 and 9.34 mg•kg-1 separately, and the contents of Cd and Pb in Leccinum rugosiceps were the lowest, which were 0.24 mg•kg-1 and 0.49 mg•kg-1 separately. The contents of Zn and Cu in fungal cap were higher than that of fungal stipe of all kinds of boletus. Contents of Cd, Zn and Cu in all five kinds of boletus exceeded national safety standards according to hygienic standard for edible fungus (GB7096-2003). Content of Cd in B. griseus was 95 times more than that of national safety standards; contents of Pb in Boletus bicolour and Boletus edulis exceeded national safety standards; contents of Pb in Boletus umbrinus and L. rugosiceps were in the range of national safety standards; contents of Hg in B. edulis and L. rugosiceps exceeded national safety standards; contents of Hg in B. griseus, B. bicolour and B. umbrinus were in the range of national safety standards.