北京市市售食用菌中铅和镉污染状况

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-1．592mg／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～0．550mg／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。

Lead and cadmium pollution in edible fungus sold in Beijing

Objective To investigate the lead and cadmium pollution in edible mushrooms sold in Beijing. Methods 146 samples of 14 species were collected form 25 markets during the period of Mar. through May, 2007 in Beijing. The pollution of lead and cadmium were analyzed respectively according to the standard of GB/TSO09. 12-2003 and GB. 7096-2003. Results The content of lead and cadmium in edible mushrooms was ND - 1. 592 mg/kg, ND -0. 550 mg/kg, respectivelly, both lower than the allowable content prescribed by The National Ministry of Health. Conclusion The contents of lead and cadmium in the mushrooms marketed in Beijing in are in safe ranges. It is worthy of mentioning the variation coefficients of heavy metal concentrations existing in edible mushrooms.