Identification of a new sulfonic acid metabolite of metolachlor in soil
Environmental Science & Technology
By: D.S. Aga, E.M. Thurman, M.E. Yockel, L.R. Zimmerman, and T.D. Williams
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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.
Suggested Citation
Aga, D., Thurman, E., Yockel, M., Zimmerman, L., Williams, T., 1996, Identification of a new sulfonic acid metabolite of metolachlor in soil: Environmental Science & Technology, v. 30, no. 2, p. 592-597, https://doi.org/10.1021/es9503600.
ISSN: 1520-5851 (online)
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Identification of a new sulfonic acid metabolite of metolachlor in soil |
| Series title | Environmental Science & Technology |
| DOI | 10.1021/es9503600 |
| Volume | 30 |
| Issue | 2 |
| Publication Date | January 29, 1996 |
| Year Published | 1996 |
| Language | English |
| Publisher | ACS |
| Contributing office(s) | Toxic Substances Hydrology Program |
| Description | 6 p. |
| First page | 592 |
| Last page | 597 |