Contamination Evaluation of Aflatoxin AFB₁,AFB₂,AFG₁ and AFG₂ in Buckwheat Foods from Some Areas

Objective:To understand the status on aflatoxin contamination in buckwheat food. Methods:The contents of aflatoxin including AFB₁,AFB₂,AFG₁ and AFG₂ in six types of buckwheat foods in 2016 including seeds,rice,flour,tea,noodles and cooked rice from coastal,southwestern,central,northern,northeastern and northwestern regions of China were investigated and evaluated by statistical analysis. Results:The relevance ratio of aflatoxin in six types ofbuckwheat foods in six areas was 34.92%,with the highest contents of 26.8 μg/kg,which was mainly AFB₁ and AFG₁ pollution,the positive rate of AFB₁ was 14.29%,and the positive rate of AFG₁ was 17.46%. According to the U.S.Food and Drug Administration on the residue of aflatoxin in food limited the general provisions of aflatoxin,there was the over standard rate of 3.17%. The results of variance analysis showed that different types of buckwheat foods had a low effect on the contents of aflatoxins. Average temperature in harvest month had an obvious effect on AFB₁ content,the higher average temperature in harvest month and the higher contents of AFB₁.There was significant positive correlation between AFB₁ and AFG₁. Conclusion:Buckwheat foods were contaminated with aflatoxin at a lesser level,and aflatoxin AFB₁ pollution was affected by the monthly temperature of the harvest season. The increasing in AFB₁ pollution was also often accompanied by an increasing in AFG₁ pollution.