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Identification of a new sulfonic acid metabolite of metolachlor in soil

Environmental Science and Technology

By:
, , , ,
DOI: 10.1021/es9503600

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Abstract

An ethanesulfonic acid metabolite of metolachlor (metolachlor ESA) was identified in soil-sample extracts by negative-ion, fast-atom bombardment mass spectrometry (FAB-MS) and FAB tandem mass spectrometry (FAB-MS/MS). Production fragments from MS/MS analysis of the deprotonated molecular ion of metolachlor ESA in the soil extract can be reconciled with the structure of the synthesized standard. The elemental compositions of the (M - H)- ions of the metolachlor ESA standard and the soil-sample extracts were confirmed by high-resolution mass spectrometry. A dissipation study revealed that metolachlor ESA is formed in soil under field conditions corresponding to a decrease in the concentration of the parent herbicide, metolachlor. The identification of the sulfonated metabolite of metolachlor suggests that the glutathione conjugation pathway is a common detoxification pathway shared by chloroacetanilide herbicides.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Identification of a new sulfonic acid metabolite of metolachlor in soil
Series title:
Environmental Science and Technology
DOI:
10.1021/es9503600
Volume
30
Issue:
2
Year Published:
1996
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
592
Last page:
597
Number of Pages:
6