关键词: 香菇, 微量元素, 背景值, 营养安全

Abstract: The content of 7 kinds of trace elements， Cu， Fe， Zn， Cr， Ni， Se and Mn， were determined by ICPMS in 10 counties (cities， districts) of Zhejiang province. The statistical analysis showed that the content of 7 kinds of elements fitted normal or lognormal distribution. The background values were 86029 mg·kg-1 for Zn， 53845 mg·kg-1 for Fe， 22159 mg·kg-1 for Mn， 10912 mg·kg-1 for Cu， 00473 mg·kg-1 for Se， 00056 mg·kg-1 for Cr and 0 mg·kg-1 for Ni. It showed regional differences and overall positive correlation among the content of 7 trace elements. Compared with the ordinary vegetables， the content of Zn was 3-5 times higher， the content of Cu was 1-2 times higher， and Mn and Se content were similar. The contents of Ni and Cr were far lower than the national food safety standards.

Key words: Lentinus edodes, trace element, background value, nutrition security