Keywords
peanut
occurrence
thin layer chromatography
How to Cite
Abstract
Eighty seven samples of peanuts and peanut products commercialized in the region of
Marília/SP, Brazil in the period of 1999 to 2001 were analyzed in order to identify and quantify aflatoxin B1
and G1, determined by thin-layer chromatography (TLC), according to the method described by Soares
and Rodriguez-Amaya. Aflatoxins were found in 56 (64,4%) of the samples and 34 (39,1%) exceeded the limits of the Brazilian legislation valid in that period which, for aflatoxin B1+G1, was 30 µg/kg. The aflatoxins concentration in the samples varied from 3 to 1659 µg/kg and the average of positive samples was 306µg/kg. In 31 (35,6%) samples were not detected aflatoxins and the 90th percentil was 601 µg/kg. Data of temperature and level of the rains in the same period showed that high levels of aflatoxins had agreed with high levels of temperature and rains and probably, it resulted on this contamination. Our studies showed that aflatoxin contamination exists, mainly due to conditions of temperature and humidity prevalent in the
region of Marília that are favorable of fungal growth. A good crop management technique and the
continuous and systematic monitoring is the best way to prevent and control the infestation of agricultural products with toxigenic moulds.
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