Abstract

In this study, a total of 110 retail cereal products from Turkey were analysed for aflatoxins (AFB1, AFB2, AFG1 and AFG2) and ochratoxin A (OTA). The mycotoxins were determined by liquid–solid extraction, immunoaffinity column clean-up and high performance liquid chromatography with fluorescence detection (HPLC-FD). Recoveries (83.9–92%) and both intra-day and inter-day repeatability (RSD < 12) of the method, meet the performance criteria set by EC regulation No. 401/2006 for the determination of the levels of mycotoxins in foodstuffs. OTA was the most prevalent toxin, with an incidence of 43.6% (range = 0.066–1.125 μg kg−1), but at levels below the European legislation limit of 3 μg kg−1. Aflatoxins were found in 27 of 110 analysed samples: twenty-seven samples with AFB1, fourteen samples with AFB2, seven samples with AFG1 and two samples with AFG2. The ranges for positive samples were 0.052–0.233 μg AFB1 kg−1, 0.022–0.044 μg AFB2 kg−1, 0.053–0.149 μg AFG1 kg−1 and 0.033–0.037 μg AFG2 kg−1. The co-occurrence of AFB1 and OTA was observed in 14.6% of the samples. This is the first study concerning the simultaneous occurrence of aflatoxins and OTA in retail cereal products from Turkey.

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