云南野生牛肝菌中砷元素含量测定及食用安全评价Determination and Food Safety Assessment of Arsenic in Wild-grown Bolete Mushrooms from Yunnan Province
杨天伟;张霁;刘鸿高;王元忠;
摘要(Abstract):
通过ICP-AES法测定了26个云南野生牛肝菌居群中As元素含量,分析不同地区、种类牛肝菌对As的富集特征;采用单项污染指数法评价云南野生牛肝菌的As污染水平;根据FAO/WHO规定的每周As允许摄入量评估野生牛肝菌的As暴露风险。结果显示:(1)不同产地、种类牛肝菌中As含量差异明显,其中菌盖的As平均含量在(0.18±0.31)~(13.33±2.21)mg·kg~(-1)dw之间,菌柄的As平均含量在(0.06±0.10)~(17.09±5.8)mg·kg~(-1)dw之间;表明牛肝菌对As元素的富集程度与牛肝菌种类、生长环境等因素有关;(2)不同种类牛肝菌菌盖、菌柄的As污染指数分别在0.35~26.66及0.12~34.20之间,且多数牛肝菌的As污染指数大于1,表明多数牛肝菌的As含量超过GB2762-2012规定的限量标准,处于重污染水平;(3)若成年人每周食用500 g新鲜牛肝菌,则通过牛肝菌摄入的As均低于FAO/WHO规定的PTWI标准(As≤0.9 mg),未达到As暴露水平;然而日常生活中人们除了通过野生牛肝菌摄入As元素外还会通过其他食物(大米、肉类等)、饮水、呼吸等途径摄入As元素,因此,为了防止As暴露危害人体健康,不宜大量或长期食用野生牛肝菌。
关键词(KeyWords): 砷;野生牛肝菌;健康风险;单项污染指数;云南
基金项目(Foundation): 国家自然科学基金项目(31260496,31460538)
作者(Author): 杨天伟;张霁;刘鸿高;王元忠;
Email:
DOI:
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