M.L. Pomes

TL;DR: Preemergent herbicides and their metabolites, particularly atrazine, deethylatrazine and metolachlor, persisted from 1989 to 1990 in the majority of rivers and streams in the mid-western United States as mentioned in this paper.

TL;DR: The combination of screening analysis by ELISA, which requires no sample preparation and works on 160 microL of sample, and confirmation by GC/MS was designed for rapid, inexpensive analysis of triazine herbicides in water.

TL;DR: Herbicides were detected in rainfall throughout the midwestern and northeastern United States during late spring and summer of 1990 and 1991 as mentioned in this paper, and they exhibited distinct geographic characteristics. But they did not show significant differences in the distribution of their concentrations.

TL;DR: In a field runoff study, alachlor rapidly formed 2-oxoethanesulfonate (ESA) as mentioned in this paper, and the median concentration of ESA (0.48 μg/L) exceeded the median concentrations of ALACHlor (< 0.05 μg/l), with highest values in the upper Midwest.

TL;DR: In this article, solid phase extraction and enzyme-linked immunosorbent assay (ELISA) were combined for trace analysis of the herbicide alachlor and its major soil metabolite, ethanesulfonic acid (ESA).