Identification of a new sulfenic acid metabolite of metolachlor in soil

被引：73

作者：

Aga, DS ^{[1
]}

Thurman, EM ^{[1
]}

Yockel, ME ^{[1
]}

Zimmerman, LR ^{[1
]}

Williams, TD ^{[1
]}

机构：

[1] UNIV KANSAS,MASS SPECTROMETRY LAB,LAWRENCE,KS 66045

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1996年 / 30卷 / 02期

关键词：

D O I：

10.1021/es9503600

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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). Product-ion 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.

引用

页码：592 / 597

页数：6

共 17 条

[11] PROPACHLOR METABOLISM IN SOYBEAN PLANTS, EXCISED SOYBEAN TISSUES, AND SOIL [J].