Resumo

PEREZ, J et al. OCCURRENCE OF AFLATOXIN M₁ IN RAW, ULTRAPASTEURIZED AND ORGANIC MILKS PRODUCED AND MARKETED IN MEXICO. Rev Salud Anim. [online]. 2008, vol.30, n.2, pp. 103-109. ISSN 0253-570X.

Milk samples coming from the central zone of Mexico (9 raw, 20 ultrapasteurized (UHT) and 15 organic) were surveyed for determining the presence of aflatoxin M_1, using a solid phase extraction column (C18), prederivatization with trifluoracetic acid and liquid chromatography coupled to a fluorescence detector. Analytical results showed that the 59% of the samples was contaminated with aflatoxin M_1, and all the cases were above the maximum level of 0.05 µg/Kg set by the European regulations for aflatoxin M₁ in liquid milk. The medians of aflatoxin M₁ found in raw, ultrapasteurized and organic milk samples were 16.21; 16.1 and 23.1 µg/Kg respectively. The percentage of samples above the maximum limit of residual was smaller in organic milk production (20%) compared with the raw and ultrapasteurized milks that were respectively above the 50 and 60%.

Palavras-chave : aflatoxin M; organic milk; Mexico.

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