Distribution of aflatoxin contamination in maize samples

Food Science and Technology (Campinas)

Eduardo Micotti Da Gloria²  César Francisco Ciacco¹  José Francisco Lopes Filho¹  Cynthia Ericsson¹  Silvio Sandoval Zocchi² 

[1],Universidade de São Paulo ESALQ Piracicaba SP ,Brasil

关键词: aflatoxin;    contamination;    distribution;    grain type;    maize;    aflatoxina;    contaminação;    distribuição;    tipo de grão;    milho;   

DOI  :  10.1590/S0101-20612004000100014

来源: SciELO

【 摘 要 】

The distribution of the aflatoxin contamination was studied among four maize fractions, separated according to Brazilian grading rules for maize. The fraction that contained fermented, moldy, heated and sprouted grains normally had the highest levels of aflatoxin. However, the fraction contribution to the whole sample contamination level took into account the contamination fraction level and its weight to the whole sample. Considering this, the fraction that contained insect damaged, hollow, up to ¼ fermented and grains damaged by other causes was normally the fraction responsible for the total contamination level in the samples. Nevertheless, the fraction contributions were variable from sample to sample. Therefore, in conclusion, it was not possible to establish a standard behavior for grain fraction-type contribution for different maize lots. The Brazilian grading by qualitative types applied to samples did not show statistic correlation with aflatoxin contamination levels (P<0.05). Two type-1 samples (the best quality type) presented contamination of 380 and 146ng/g. The number of samples with contamination levels above those allowed by Brazilian law (20ng/g) was the same for qualitative types 2, 3, and BS (Below Standard).

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