Abstract:

【Objective】Background values of arsenic(As), cadmium (Cd), mercury (Hg) and lead (Pb) in main wild edible mushrooms in Yunnan province were investigated. Accumulation of heavy metal in different wild mushroom species were studied to provide a scientific basis for evaluation of the safety of the wild edible mushrooms. 【Method】 One hundred and sixty-five fresh samples, which belongs to 12 species, i.e. Boletus brunneissimus, Boletus duriusculus, Boletus eduli, Boletus granulatus, Boletus griseus, Boletus magnificus, Cantharellus cibarius, Catathelasma ventricosum, Russula virescens, Termitomyces albuminosus, Thelephora ganbajun, Tricholoma matsutake, were collected from 25 counties in Yunnan province. Nitric acid-perchloric acid wet digestion was used in determining the As, Cd and Pb, while Hg was determined by high pressure digestion. 【Result】 Significant differences were found in As, Cd, Hg and Pb among various species of wild edible mushrooms. The average As content ranged from 0.055 mg•kg-1 in B. magnificus to 0.515 mg•kg-1 in T. matsutake. The average Cd content ranged from 0.039 mg•kg-1 in B. brunneissimus to 1.280 mg•kg-1 in T. albuminosus. The average Hg content ranged from 0.015 mg•kg-1 in T. ganbajun to 0.608 mg•kg-1 in B. edulis. The average Pb content ranged from 0.272 mg•kg-1 in B. granulatus to 1.782 mg•kg-1 in T. albuminosus. 【Conclusion】 There were significant differences in As, Cd, Hg and Pb content among different species of wild edible mushrooms.

Key words: arsenic')">arsenic, cadmium, mercury, lead, background value, food safety