Determination of s-triazine metabolites: a mass spectrometric investigation
1996
Frassanito, R. | De Socio, G. | Laura, D. | Rotilio, D.
The s-triazine herbicides have highly polar metabolites that often cannot be analyzed directly by gas chromatography-mass spectrometry (GC-MS). Chemical derivatization may be necessary to improve identification and quantitative analytical methods. The analysis of eight suspected metabolites of two s-triazine herbicides, atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino-s-triazine] and ametryn [2-(methylthio)-4-(ethylamino)-6-(isopropylamino)-s-triazine], was performed in the electron-impact mode by direct inlet system-mass spectrometry (DIS-MS) and by GC-MS, after sample derivatization. So far, previous derivatization procedures were either difficult or yielded a mixture of derivatives. By using N-methylbis[trifluoroacetamide] (MBTFA), we obtained only one derivative of each metabolite, and the method easily detected microbial degradation-derived metabolites. Moreover, we identified some frequently present ions that can be used in the analysis of complex samples.
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