重庆市野生食用菌中总砷及砷形态含量调查

发布时间：2018-09-19 19:14

【摘要】：目的对重庆市不同地区野生食用菌中总砷及砷形态进行分析,为其食用的安全性提供参考依据。方法总砷采用微波消解-电感耦合等离子质谱法(ICP/MS)测定;不同形态砷经1%硝酸浸提,离子色谱-电感耦合等离子质谱法(IC-ICP/MS)测定。结果所测野生食用菌中总砷含量为34.6μg/kg~3.89×104μg/kg(以干重计),无机砷含量为38.1μg/kg~1.18×104μg/kg(以干重计),无机砷为总砷的(35.5%±27.7%),总砷含量高于500μg/kg的3种野生食用菌中砷以有机砷形式为主,而在测定的4种有机砷中松茸和松树菌中砷甜菜碱(As B)占总砷的50%以上,牛肝菌中二甲基砷(DMA)占总砷的(39.3%±25.3%)。结论野生食用菌中总砷、无机砷的含量随地域变化而改变。已研究的3种野生食用菌中无机砷、有机砷形态的分布亦随种类而不同,砷在野生食用菌中总体上以有机砷的形式存在,而在有机砷中以砷甜菜碱(As B)存在为主。
[Abstract]:Objective to analyze the forms of total arsenic and arsenic in wild edible fungi in different areas of Chongqing, and to provide reference basis for their edible safety. Methods Total arsenic was determined by microwave digestion and inductively coupled plasma mass spectrometry (ICP/MS). Arsenic was extracted by 1% nitric acid and determined by ion chromatography-inductively coupled plasma mass spectrometry (IC-ICP/MS). Results the total arsenic content of wild edible fungi was 34.6 渭 g/kg~3.89 脳 10 ~ 4 渭 g/kg (measured by dry weight), inorganic arsenic content was 38.1 渭 g/kg~1.18 脳 10 ~ 4 渭 g/kg (measured by dry weight), inorganic arsenic was total arsenic (35.5% 卤27.7%), total arsenic content was higher than 500 渭 g/kg. In the four kinds of organic arsenic, the content of arsenic betaine (As B) accounted for more than 50% of the total arsenic, and the dimethyl arsenic (DMA) in boletus accounted for 39.3% 卤25.3% of the total arsenic. Conclusion the contents of total arsenic and inorganic arsenic in wild edible fungi vary with regional changes. The distribution of organic arsenic in the three species of wild edible fungi was different. Arsenic existed in wild edible fungi as a whole in the form of organic arsenic, and in organic arsenic as betaine (As B).
【作者单位】：重庆市疾病预防控制中心;
【基金】：重庆市医学科研计划项目(项目编号:2014113)
【分类号】：R155.5

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