Detection of new fumonisin mycotoxins and fumonisin-like compounds by reversed-phase high-performance liquid chromatography/electrospray ionization ion trap mass spectrometry.

作者: Tibor Bartók , Árpád Szécsi , András Szekeres , Ákos Mesterházy , Mihály Bartók

DOI: 10.1002/RCM.2607

关键词:

摘要: Fumonisins were produced in a rice culture infected with Fusarium verticillioides. To decrease the possibility of formation artifacts, fumonisins analyzed by reversed-phase high-performance liquid chromatography electrospray ionization ion trap tandem mass spectrometry (RP-HPLC/ESI-IT-MS2) immediately after extraction material without any sample clean-up. In addition to already known fumonisins, numerous new fumonisin mycotoxins and fumonisin-like compounds detected. On basis IT-MS2 data, detailed fragmentation pathways including mechanisms proposed for different series fumonisins. The retention times, masses protonated molecules product ions backbones characteristic neutral losses from suggested their structures (applying well-known designation): iso-FA1a,b, iso-FB1a–d, iso-FB2,3a–e, PHFB2a–c, PHFB4a–d, FB5/iso-FB5a–d, FBK1 2TCA, FBK4 FC2, iso-FC2,3, PHFC4, FD FBX series. relative quantities found extract expressed as percentages FB1 (0.02–100%). backbone compound denoted contained fewer carbon atoms than C19 or C20 may well be precursor longer compounds. For (12 compounds), one two OH groups attached esterified carboxylic acids other tricarballylic acid, such cis-aconitic oxalylsuccinic acid oxalylfumaric acid. Copyright © 2006 John Wiley & Sons, Ltd.

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