关键词: 干食用菌, 香菇, 黑木耳, 银耳, 重金属, 污染评估

Abstract: The concentrations of four heavy metal elements Hg, As, Pb and Cd in three kinds of dried edible fungi, Lentinus edodes, Auricularia auricula and Tremella fuciformis sampled in Zhejiang trading market were detected and their pollution situations were investigated and evaluated. The results showed that enrichment abilities to an element were different among three edible fungi. According to an average value of concentrations of As element, the order from high to low in four fungi was Lentinus edodes> Auricularia auricular > Tremella fuciformis. The order from high to low of Pb concentrations was Auricularia auricular > Lentinus edodes > Tremella fuciformis. The order from high to low of Cd concentrations was Lentinus edodes> Tremella fuciformis > Auricularia auricular. The order from high to low of Hg concentrations was Auricularia auricular > Lentinus edodes > Tremella fuciformis. Four heavy metal concentrations were different in one dried edible fungus. In Lentinus edodes, the order from high to low was Cd>As>Pb>Hg, in Auricularia auricular was Pb>As>Cd>Hg and in Tremella fuciformi was Cd>Pb>As>Hg. According to the National Standards of China(Hygienic standard for edible fungi GB 7096-2003, Maximum levels of contaminants in foods GB 2762-2005, nuisanceless food edible fungi NY5095-2006, hygienic standard for tremella fuciformis berk GB 11675-2003), the impermissible levels of Cd in three edible fungi were higher. The metal pollution on three edible fungi by single factor contamination index and complex factors index were evaluated. Finally, the causes of impermissible levels and the pollution situation for heavy metal pollution in dried edible fungi were analyzed. Some advice and suggestion were proposed in this paper．

Key words: dried edible fungi, Lentinus edodes, Auricularia auricular, Tremella fuciformis, heavy metal elements, pollution assessment