Electron ionization mass spectral fragmentation of deoxynivalenol and related tricothecenes |
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Authors: | Rodrigues-Fo Edson Mirocha C J Xie Weiping Krick Thomas P Martinelli J A |
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Affiliation: | Departamento de Química, Universidade Federal de S?o Carlos CP 676, CEP 13565-905, S?o Carlos, SP Brazil. edson@dq.ufscar.br |
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Abstract: | Careful analysis of the electron impact (EI) mass spectral data obtained for the trimethylsilyl (TMS) ethers of known trichothecene mycotoxins of the deoxynivalenol group permitted the construction of a database useful for the identification of these mycotoxins directly from a gas chromatography/mass spectrometry (GC/MS) run. Structures of the ions at m/z 103, 117, 147 and 191 were elucidated by high-resolution mass spectrometry (HRMS) and a fragmentation scheme was suggested. The relative abundances of these ions in the mass spectra of the trichothecenes allowed a fast structural diagnosis during analysis of biological matrices. A new mycotoxin of this group, 3-acetylnivalenol, was tentatively identified by using MS data interpretation only. |
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