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Negative-ion Mass Spectrometry of Sulfonylurea Herbicides


​Journal of Mass Spectrometry

Volume 30, Issue 11, pages 1574-1580

DOI: 10.1002/jms.1190301109


​Sulfonylurea herbicides have been studied using negative-ion desorption chemical ionization (DCI) mass spectrometry (MS) and DCI-MS/MS techniques. Both [M [BOND] H] and M−· ions were observed in the DCI mass spectra. The collisionally activated dissociation (CAD) spectra were characteristic of the structure of the herbicides examined. The fragmentation pattern was established based on the tandem mass spectra of the in situ deuterated sulfonylureas and on the comparison of the CAD spectra of sulfonylurea fragment ions with the CAD spectra of the ions derived from saccharin (o-benzoic sulfimide) and methyl 2-(aminosulfonyl)benzoate.


Winnik W.;Brumley W.;Betowski L.D.



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Created at 19/03/2013 11:19 by System Account
Last modified at 10/07/2013 09:51 by SMITH, Melanie