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ABSTRACTAflatoxins (AFs) are highly toxic and carcinogenic secondary fungal metabolites and have been detected in various food commodities including pistachio nuts. One hundred samples of pistachio nuts, purchased from retail shops and local markets in Esfahan province of Iran from September to November 2007, were analyzed for AFs content by immunoaffinity column (IAC) cleanup with liquid chromatography and fluorescence detection. Results showed that the frequency of total AFs (AFT), aflatoxin B1 (AFB1), aflatoxin B2, aflatoxin G1 and aflatoxin G2 in pistachio samples were 95, 95, 42, 64 and 28%, respectively. Thirty‐six and 29% of pistachio nuts exceeded the maximum tolerable limit (5 and 15 µg/kg) set for AFB1 and AFT by European Union regulations, respectively. The present paper is the first report on the natural occurrence of AFs in available pistachio nuts from retail shops in Esfahan province of Iran....
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