Abstract
A very sensitive method is described for the detection of aflatoxins in pistachio nuts. The method employs the extraction procedure used in the BF method (described in the Association of Official Analytical Chemist' Book of Methods) followed by an acid alumina column clean-up to remove sample components which would otherwise interfere in the final determinative step. The quantitation of the afiatoxins is carried out by high-performance liquid chromatography on a C 18 reversed-phase column after conversion of aflatoxins B 1 and G 1 to their more fluorescent derivatives, B 2a and G 2a. The limit of detection was found to be 0.5 μ/kg. The chromatograms were found to be free of interfering peaks and multiple injections showed excellent reproducibility.
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