Abstract
The electroinactiveAlternaria mycotoxins, altenuene and isoaltenuene, are separated by reversed-phase liquid chromatography and derivatized (post-column) with electrochemically generated bromine. Bromine is produced, on-line, by a coulometric cell and the excess of bromine, after reaction with the analyte in the column effluent, is electrochemically detected. The proposed method compares well in term of sensitivity with existing techniques for the determination of altenuene and isoaltenuene in artificially contaminated samples and, in addition, is superior in terms of selectivity. At a signal-to-noise ratio of 3 the detection limit is 8 ng on column. The relationships between generating current, signal and noise are given.
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