Identification of unknown isomers of fumonisin B5 mycotoxin in a fusarium verticillioides culture by high-performance liquid chromatography/electrospray ionization time-of-flight and ion trap mass spectrometry

Tibor Bartók, László Tölgyesi, Árpád Szécsi, János Varga, Mihály Bartók, Ákos Mesterházy, Ernö Gyimes, Antal Véha

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Several new fumonisin B5 mycotoxin isomers (iso-FB5) present in a rice culture inoculated with Fusarium verticillioides were separated on a RP-HPLC column recommended for the separation of structural isomers, and subsequently detected by time-of-flight and ion trap mass spectrometry. The exact masses of the eluted compounds were determined by using time-of-flight mass spectrometry. The m/z values of the 20 characteristic product ions including the hydrocarbon backbone and the characteristic neutral mass losses from the molecular and product ions of the compounds obtained by ion trap mass spectrometry, unambiguously indicated of the unknown iso-FB 5 compounds. The total amount of FB5 toxin and its isomers was 0.9% of the quantity of the main compound (FB1 toxin), which is a noteworthy quantity considering their potential toxicity. Based on the semi-quantitative measurement data it can be assumed that, in addition to the FB5 of unknown structure, isomers designated 1, 2, and 20 can also be isolated among the iso-FB5 compounds.

Original languageEnglish
Pages (from-to)1549-1561
Number of pages13
JournalJournal of Liquid Chromatography and Related Technologies
Issue number11
Publication statusPublished - Apr 1 2013



  • FB
  • Fusarium verticillioides
  • LC-MS
  • LC-MS/MS
  • fumonisin B isomers
  • mycotoxin

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Pharmaceutical Science
  • Clinical Biochemistry

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