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目的了解北京市市售食用菌中铅、镉的污染状况。方法于2007年3至5月从北京市25个市场(14个农贸市场、11个超市)采集14种共146份食用菌样品,按照《食品中铅的测定》(GB/T5009.12-2003)和《食品中镉的测定》(GB/T5009.15-2003)要求的方法检测食用菌中铅、镉的含量。结果检测发现食用菌中铅含量为未检出～1.592 mg/kg,检测样品铅含量均低于《食用菌卫生标准》(GB7096-2003),食用菌干品镉含量为未检出～0.550 mg/kg,均低于《食品中污染物限量标准》(GB2762-2005)。食用菌干品的铅、镉含量远高于鲜品,干品与鲜品铅含量均值之比为7.5,镉含量均值之比为9.6。结论北京市市售食用菌中铅、镉含量处于安全范围,污染较轻;且不同品种或同一品种不同产地食用菌铅、镉含量差异很大。
Objective To understand the pollution status of lead and cadmium in edible mushrooms in Beijing. Methods A total of 146 edible fungi samples from 14 markets were collected from 25 markets (14 farmer’s markets and 11 supermarkets) in Beijing from March to May 2007. According to “Determination of lead in food” (GB / T5009.12-2003 ) And “Determination of cadmium in food” (GB / T5009.15-2003) required to detect edible mushrooms lead, cadmium content. Results The results showed that the content of lead in edible mushroom was undetectable ~ 1.592 mg / kg, the content of lead in tested samples was lower than “Sanitary Standard for Edible Fungi” (GB7096-2003), and the content of cadmium in dried edible mushroom was undetectable ~ 0.550 mg / kg, are lower than the “limit of contaminants in food standards” (GB2762-2005). Edible mushrooms lead, cadmium content is much higher than the fresh, dry and fresh lead content of the average ratio of 7.5, the average ratio of cadmium was 9.6. Conclusion The contents of lead and cadmium in the edible mushrooms in Beijing are in a safe range with less pollution. The contents of lead and cadmium in edible fungi of different varieties or in different areas of the same species vary greatly.