Separation and detection of herbicides in water by micellar electrokinetic capillary chromatography.
The herbicides linuron, metolachlor, atrazine and metsulfuron were analysed using micellar electrokinetic capillary chromatography (MECC) after a 1000-fold concentration step by solid-phase extraction (SPE). Recoveries ranged from 80 to 92%, depending on the concentration and the number of active substances in the sample. Furthermore, the hydrolysis products of metsulfuron were analysed by MECC and by gas chromatography-mass spectrometry (GC-MS). Representative MECC and GC-MS profiles are shown and the structures of the hydrolysis products are proposed on the basis of their chromatographic and mass spectra features. A tentative pathway for the degradation of metsulfuron is proposed.
Institute of Agronomy, University of Bologna, Italy.
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Dinelli
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Bonetti
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Catizone
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GC
Galletti
D002845:Chromatography; D008401:Gas Chromatography-Mass Spectrometry; D006540:Herbicides / Q000032:analysis* / Q000302:isolation & purification; D007202:Indicators and Reagents; D008823:Micelles; D010573:Pesticide Residues / Q000032:analysis* / Q000302:isolation & purification; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
D006540:Herbicides; D007202:Indicators and Reagents; D008823:Micelles; D010573:Pesticide Residues; D014874:Water Pollutants, Chemical