COLLECTION OF ION-TRAP MASS-SPECTRA OF SULFONYLUREA PYROLYSIS PRODUCTS

The pyrograms of 14 sulfonylureas, i.e. herbicides characterized by hi gh biological activity and low application dose are discussed and the mass spectra of over 30 relevant pyrolysis products as obtained with a heated filament pyrolyzer interfaced to a capillary gas chromatograph /ion-trap detector mass spectrometer are presented. Such a data compil ation is useful for diagnostic purposes for both intact sulfonylureas and their metabolites after degradation in soil, because metabolites a nd pyrolysis products are often identical and most of their mass spect ra are lacking in commercially available mass spectral libraries. The performance of the ion-trap detector based on the qualify of the mass spectra is briefly discussed.