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Liquid chromatography/electrospray ionisation sequential mass spectrometric identification of the main chlortoluron by-products during water disinfection using chlorine
MedLine Citation:
PMID:  10825244     Owner:  NLM     Status:  Publisher    
The main degradation by-products of the herbicide chlortoluron formed during water disinfection with HOCl/ClO(-) have been separated and identified by liquid chromatography/electrospray ionisation sequential mass spectrometry (LC/ESI-MS(n)). Chlorination and hydroxylation reactions seem to occur exclusively on the aromatic ring of chlortoluron, leading to by-products which show characteristic fragmentation patterns. Indeed, chlortoluron-like ESI spectra were always observed for chlorinated by-products, showing only a fragment at m/z 72. In contrast, hydroxylated and chloro/hydroxylated by-products gave a much more complex fragmentation pattern that could be elucidated by MS(n) (n = 1-4) experiments. A mechanistic scheme rationalising the observed fragmentation pattern is proposed and discussed. Copyright 2000 John Wiley & Sons, Ltd.
Zambonin; Losito; Palmisano
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Publication Detail:
Journal Detail:
Title:  Rapid communications in mass spectrometry : RCM     Volume:  14     ISSN:  1097-0231     ISO Abbreviation:  Rapid Commun. Mass Spectrom.     Publication Date:  2000  
Date Detail:
Created Date:  2000-06-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8802365     Medline TA:  Rapid Commun Mass Spectrom     Country:  ENGLAND    
Other Details:
Languages:  Eng     Pagination:  824-8     Citation Subset:  -    
Dipartimento di Chimica, Universita degli Studi della Basilicata, Via N. Sauro 85, 85100-Potenza, Italy.
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