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The characterization of trichothecenes as their heptafluorobutyrate esters by negative-ion chemical ionization tandem mass spectrometry

✍ Scribed by R. Kostiainen; A. Rizzo

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
862 KB
Volume
204
Category
Article
ISSN
0003-2670

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✦ Synopsis

Negative-ion chemical ionization (NCI) and collisionally activated mass spectra are presented for heptafluorobutyryl (HFB) esters of eight trichothecenes. The ion-source conditions have a dramatic effect on the NC1 spectra and only at low source temperatures can intense parent ions, i.e., M -for bis-and tris-HFB esters (neosolaniol, HT-2 Toxin, monoacetoxyscirpenol, fusarenon-X and deoxynivalenol) and [ M-HF] -for mono-HFB esters (T-2 Toxin, Iso-T-2 Toxin, and diacetoxyscupenol) , be generated. High selectivity and a sensitivity down to picogram (0.2-2 pg) levels were achieved with gas chromatography/NC1 tandem mass spectrometry. Application to a spiked oats sample is described.

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