| Abstract: | Analytical methods using high-performance liquid chromatography-diode array detection (HPLC-DAD) and high-performance liquid chromatography/mass spectrometry (HPLC/MS) were developed for the analysis of the following chloroacetanilide herbicide metabolites in water: alachlor ethanesulfonic acid (ESA); alachlor oxanilic acid; acetochlor ESA; acetochlor oxanilic acid; metolachlor ESA; and metolachlor oxanilic acid. Good precision and accuracy were demonstrated for both the HPLC-DAD and HPLC/MS methods in reagent water, surface water, and ground water. The average HPLC-DAD recoveries of the chloroacetanilide herbicide metabolites from water samples spiked at 0.25, 0.5 and 2.0 ??g/l ranged from 84 to 112%, with relative standard deviations of 18% or less. The average HPLC/MS recoveries of the metabolites from water samples spiked at 0.05, 0.2 and 2.0 ??g/l ranged from 81 to 118%, with relative standard deviations of 20% or less. The limit of quantitation (LOQ) for all metabolites using the HPLC-DAD method was 0.20 ??g/l, whereas the LOQ using the HPLC/MS method was at 0.05 ??g/l. These metabolite-determination methods are valuable for acquiring information about water quality and the fate and transport of the parent chloroacetanilide herbicides in water. Copyright (C) 2000 Elsevier Science B.V. |
| Genre: | Conference Paper |
| ProdID: | 70022817 |
| Citation Author: | Hostetler, K. A.; Thurman, E. M. |
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| Citation End Page: | 155 |
| Citation Issue: | 2-3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science of the Total Environment |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Determination of chloroacetanilide herbicide metabolites in water using high-performance liquid chromatography-diode array detection and high-performance liquid chromatography/mass spectrometry; 2000; Conference Paper; Science of the Total Environment; Hostetler, K. A.; Thurman, E. M. |
| Citation Start Page: | 147 |
| Citation Volume: | 248 |
| Citation Year: | 2000 |
| Type: | citation/reference |
| Text: | Determination of chloroacetanilide herbicide metabolites in water using high-performance liquid chromatography-diode array detection and high-performance liquid chromatography/mass spectrometry; 2000; Conference Paper; Science of the Total Environment; Hostetler, K. A.; Thurman, E. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/S0048-9697(99)00538-0 |
| Date Other: | Sat, 1 Jan 2000 00:00 -0600 |
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