title: Electron ionization mass spectral fragmentation of deoxynivalenol and related tricothecenes.
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.
authors.affiliation: Departamento de Química, Universidade Federal de São Carlos CP 676, CEP 13565-905, São Carlos, SP Brazil. edson@dq.ufscar.br
authors.forename: Edson
authors.initials: E
authors.lastname: Rodrigues-Fo
authors.forename: C J
authors.initials: CJ
authors.lastname: Mirocha
authors.forename: Weiping
authors.initials: W
authors.lastname: Xie
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Krick
authors.forename: J A
authors.initials: JA
authors.lastname: Martinelli
mesh_terms: D001938:Brazil; D005670:Fusarium / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D009183:Mycotoxins / Q000032:analysis*; D014255:Trichothecenes / Q000032:analysis*; D014297:Trimethylsilyl Compounds / Q000737:chemistry; D014908:Triticum / Q000382:microbiology
chemical_list: D009183:Mycotoxins; D014255:Trichothecenes; D014297:Trimethylsilyl Compounds; C007262:deoxynivalenol