Investigation And Risk Assessment Of Aflatoxin B₁ In Main Foods Of China

Aflatoxins are secondary metabolites produced by Aspergillus flavus,Aspergillumsnomius and Aspergillus parasiticus,they commonly contaminates agricultural commodities,food and animal feedstuffs.These toxins are highly toxic,mutagenic,teratogenic andcarcinogenic.Aflatoxin B₁(AFB₁)has the largest extension and the strongest toxicity,itseriously threatened human and animal healthy or life safety.In order to know the contamination situation of AFB₁ in main foods of our country,takeeffective measures to control AFB₁ contamination to guarantee the food safety,weinvestigated AFB₁ in main cereal and vegetable oil foods and did a risk assessment of AFB₁ inthe two kinds of foods.AFB₁ contents in samples(486 cereal foods and 146 vegetable oilfoods)from 18 big cities were determined,the results were compared to the maximumpermissible concentration.The distribution of AFB₁ in main big cities and the two kinds offoods were analyzed.The data got from this research can be used to set the permissibleconcentration of AFB₁ in foods and to establish the emergency management and warningsystem for AFB₁ in foods.The main results of this paper:(1)AFB₁ contents in two peanut foods and three peanut oil foods surpassed thepermissible concentration of national standard.(2)The positive rates of AFB₁ in cereal and vegetable oil foods were 0.41%,2.06%,respectively.(3)The contamination situation of AFB₁ in south was worsen than that in north,especially in cities such as city 17,city 3,city 8,city 4 and city 2.(4)According to the average and the 95%upper confidence limits value,the risk of AFB₁was 3.5,4.0 per million,respectively.The results of city 17 were 3.7,4.7 per million,respectively.