Analysis of Heavy Metals in Dried Edible Fungi Commercially Available in Beijing and Assessment of Health Risks via Consumption
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Abstract:
The concentrations of 4 heavy metals Cd, Pb, As and Hg in eight kinds of dried edible fungi commercially available in Beijing were determined, and the potential health risks to the Beijing local residents via consumption of edible fungi were were analyzed based on the Nemorow complex pollution index (p) and target hazard quotients (THQ). The results showed that the concentrations of Cd, Pb, As and Hg in edible fungi were ND~9.332 mg/kg, ND~2.060 mg/kg, ND~24.690 mg/kg, 0.004~0.448 mg/kg, respectively. Most of the heavy metals in edible fungi were below the threshold levels of China quality standard for edible fungi, while the over-standard rates were 2.2%, 2.8% for Cd, As, respectively. The Agaricus blazeimuril is the most severely polluted edible fungi by heavy metals with p value of 1.41 (mild pollution level), and the p value of Agrocybe cylindracea is 0.95, reaching the food safety alert level, while the other six kinds of dried edible fungi were at safety level. The results of health risks associated with heavy metal were found that the THQ values of Agaricus blazeimuril for As and the TTHQ values of Agaricus blazeimuril, Armillaria mellea, and Dictyophora indusiate for 4heavy metals were all higher than 1. It was indicated that the local inhabitants were faced with potential health risk in some extent by ingesting heavy metals via consumption of these edible fungi, and Agaricus blazeimuril made more contribution to the Cd, Pb Hg. The above results showed that the dried edible fungi commercially available in Beijing were generally safe with low heavy metals exposure risk to the local population through consumption.
