2 edition of Detection of the herbicide alachlor and its sulfonic acid metabolite in soil found in the catalog.
Detection of the herbicide alachlor and its sulfonic acid metabolite in soil
Lesley A. Smith
Published
1995
.
Written in
Edition Notes
| Statement | by Lesley A. Smith. |
| The Physical Object | |
|---|---|
| Pagination | 41 leaves, bound : |
| Number of Pages | 41 |
| ID Numbers | |
| Open Library | OL15417039M |
Herbicide compounds were prevalent in ground water across Iowa, being detected in 70% of the municipal wells sampled during the summer of Herbicide degradation products were three of the four most frequently detected compounds for this study. The degradation product alachlor ethanesulfonic acid was the most frequently detected compound (%), followed by atrazine (%), and the A metabolite of alachlor, ethane sulfonic acid (ESA), is formed in soil and is subject to leaching. On the basis of the presence of ESA in monitoring wells downgradient of alachlor treated fields, DATCP and other state agencies decided that ESA should be included in the survey of alachlor
Fairchild, J.F., Sappington, L.C., and Ruessler, D.S., , An ecological risk assessment of the potential for herbicide impacts on primary productivity of the Lower A. Adams, C.D., Randtke, S.J., Thurman, E.M., and Hulsey, R.A., , Atrazine and its degradation products in soil and ground water, and the effectiveness of water
The inputs of atrazine and alachlor herbicides to surface and ground waters from irrigated areas dedicated to corn cultivation in the Castilla-León (C-L) region (Spain) as related to the application of both herbicides were studied. Enzyme-linked immunosorbent assays (ELISA) were used for monitoring the atrazine and alachlor concentrations in 98 water samples taken from these :// Battaglin, W.A., , Using ratios of atrazine transformation products to atrazine to determine its source in Midwestern streams, in Kenny, J., ed., Ground Water
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Determination of Alachlor and Its Metabolite 2,6-Diethylaniline in Microbial Culture Medium Using Online Microdialysis Enriched-Sampling Coupled to High-Performance Liquid Chromatography. Journal of Agricultural and Food Chemistry59 (15), DOI: /:// Identification of a New Sulfonic Acid Metabolite of Metolachlor in Soil.
Environmental Science & Technology30 (2), DOI: /es Thomas L. Potter and Thomas L. Carpenter. Occurrence of Alachlor Environmental Degradation Products in :// Detection of the herbicide alachlor and its sulfonic acid metabolite in soil. Download PDF (1 MB) Abstract. Graduation date: The chloroacetanilide herbicide alachlor is the second most widely used herbicide\ud in the US, where it is used on major crops such as corn and soybean.
and was below the detection limit in soil collected Alachlor and metolachlor are dechlorinated and transformed into their corresponding ethane sulfonic acid (ESA) metabolites in soil.
In a field-disappearance study, it was shown that alachlor ESA Alachlor and its metabolite, 2-[(2‘,6‘-diethylphenyl)(methoxymethyl)amino]oxoethanesulfonate (ESA), were identified in 76 reservoirs in the midwestern United States using immunoassay, liquid chromatography, and gas chromatography/mass spectrometry.
The median concentration of ESA ( μg/L) exceeded the median concentration of alachlor ( 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 SPE and ELISA are combined for the trace analysis of the herbicide alachlor and its major soil metabolite, ESA.
The method is viable for the analysis of both surface- and ground water samples and is comparable to GC/MS and HPLC analyses for alachlor and ESA (Aga et al., ). Download: Download full-size image; Fig.
Pathways for The structure of ESA (Fig. 1) is different from alachlor at only one position where the chlorine atom of the parent molecule has been replaced by a sulfonic acid moiety. Alachlor is a herbicide used for pre-plant and early post-emergent control of grass and broadleaf weeds in corn and other :// trometry.
Two metabolites of the chloroacetanilde herbicides—ethane sulfonic acid and oxanilic acid—are detected by high-performance liquid chromatography with diode-array detection and liquid chromatogra-phy/mass spectrometry.
Alachlor ethane sulfonic acid also has been detected by solid-phase extraction and enzyme-linked immunosorbent The formation and the transport of sulfonic acid metabolites of Alachlor and Metolachlor were established by Aga and Thurman.
Decomposition in soil and occurrence in ground water of the herbicide glyphosate was studied by Börjesson and Torstensson [6] after its application for weed control on a Swedish railway :// Alachlor is an aromatic amide that is N-(2,6-diethylphenyl)acetamide substituted by a methoxymethyl group at at the nitrogen atom while one of the hydrogens of the methyl group has been replaced by a chlorine atom.
It has a role as a herbicide, an environmental contaminant and a xenobiotic. It is an organochlorine compound, a monocarboxylic acid amide and an aromatic :// 1. Aga, D.S.; Thurman, E.M. “Application of solid-phase extraction for trace analysis of herbicides in water and soil by enzyme-linked immunosorbent assay”.
1. Introduction. The chloroacetanilide herbicides (alachlor, acetochlor, and metolachlor) are an important class of herbicides in the USA.
Together with the triazine compounds, chloroacetanilide herbicides compose the majority of pesticides applied in the Midwestern USA for control of weeds in corn, soybeans, and other row crops (Gianessi and Puffer, ). Solid-phase extraction (SPE) and enzyme-linked immunosorbent assay (ELISA) were combined for the trace analysis of the herbicide alachlor and its major soil metabolite, ethane-sulfonic acid (ESA).
Atrazine, metolachlor, and the ethane-sulfonic acid metabolite of alachlor (alachlor ESA) were the most frequently detected herbicides and, in general, were present in the largest concentrations. Almost 80% of the annual herbicide load to the Gulf of Mexico A high-performance liquid chromatography method for the analysis of 2-[2,6-diethylphenyl) (methoxymethyl)amino]oxoethanesulfonic acid, a major soil metabolite of alachlor thanesulfonic acid, is formed by soil microbes via glutathi-one conjugation and subsequent oxidative metabolism.
The chemical structure of ESA (Fig. 1) differs from that of alachlor at one position where the chlorine atom of the parent molecule has been replaced by a sulfonic acid moiety. Alachlor is a selective herbicide used for preplant and The sulfonic acid degradates of chloroacetanilide herbicides (e.g., alachlor, acetochlor and metolachlor) have been frequently detected as the major degradates in water and soils at levels often ethane sulfonic acid and oxanilic acid } are detected by high-performance liquid chromatography with diode-array detection and liquid chromatographyrmass spectrometry.
Alachlor ethane sulfonic acid also has been detected by solid-phase extraction and enzyme-linked immunosorbent assay. Six phenylurea metabolites are all detected by Organic Chemicals/Scribner et al_Total Env_pdf.
Cardoza et al. have used stopflow HPLC-NMR for the on-line separation and detection of the cis and trans rotational isomers of alachlor-ethane sulfonic acid (alachlor-ESA, Fig. 17U) []. The. To manage the safety of the herbicide metazachlor, analytical methods are required for the determination of metazachlor metabolites in agricultural crops.
Herein, a liquid chromatography–tandem mass spectrometry (LC–MS/MS) method was developed for the simultaneous determination of metazachlor metabolites (M04, M08, and M16) in various agricultural :// Biological degradation by dechlorination in soil leads to the formation of the ethane sulfonic acid (ESA) metabolite (Stamper and Tuovinen, ).
Alachlor ESA is a more polar compound than alachlor and has been found in groundwater and in surface water more often and in higher concentrations than the parent :// It is a non-selective, post-emergence and systemic herbicide that controls or kills more weed species than any other herbicide.
Its mechanism of action is through the shikimate metabolic pathway, leading to the disruption of aromatic amino acid synthesis. It was introduced in the early s because of its relatively low toxicity, long-lasting
