GC-ITD analysis of chlortoluron and its metabolites in cereals
Chlortoluron and its metabolites have been determined in cereals by gas chromatography. Chlortoluron is pyrolyzed to the corresponding phenylisocyanate, which is determined by GC with nitrogen-phosphorous detection (NPD) and confirmed by GC with ion trap detection (ITD). N-demethyl metabolites of chlortoluron are determined, after conversion to the perfluoroacyl derivatives, by GC with ion trap detection by single ion monitoring;N-ethyl-p-chloroacetanilide is used as internal standard. The hydroxymethyl metabolite, mainly present as β-glucoside, can be analyzed, after enzymatic hydrolysis with β-glucosidase and conversion to the ethyl derivative, by GC with ion trap detection by SIM;N-ethylchlortoluron is used as internal standard. The methods proposed are reproducible and sensitive enough for determination of these compounds at residue levels in cereals. © 1993 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH.
| Main Authors: | , , |
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| Format: | journal article biblioteca |
| Language: | eng |
| Published: |
1993
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| Online Access: | http://hdl.handle.net/20.500.12792/3424 |
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