Electron ionization mass spectral fragmentation of deoxynivalenol and related tricothecenes.
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.
Rodrigues-Fo
Edson
E
Departamento de Química, Universidade Federal de São Carlos CP 676, CEP 13565-905, São Carlos, SP Brazil. edson@dq.ufscar.br
Mirocha
C J
CJ
Xie
Weiping
W
Krick
Thomas P
TP
Martinelli
J A
JA
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
D009183:Mycotoxins; D014255:Trichothecenes; D014297:Trimethylsilyl Compounds; C007262:deoxynivalenol