Analysis of mycotoxins in cereals and animal feed using a multi-toxin gel permeation chromatography clean-up method

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Abstract
Gel permeation chromatography has been used to clean up extracts from cereals and animal feeds containing a range of mycotoxins. A mixture of dichloromethane: IM hydrochloric acid, 10:1 by volume is used as the extraction solvent and clean-up is carried out on a Bio — Beads S-X3 column using dichloromethane: ethyl acetate containing a small amount of formic acid as the elution solvent. Chromatographic separation and detection was by HPLC with fluorescence or ultraviolet detection although the choice of detection method is left to the user. The method has been tested for 14 mycotoxins and results are presented for cereals fortified with mycotoxins and for samples naturally contaminated with aflatoxins, citrinin, zearalenone, and ochratoxin A.

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