| Abstract: | A sensitive and reliable gas chromatographic/mass spectrometric (GC/MS) method for determining acetochlor in environmental water samples was developed. The method involves automated extraction of the herbicide from a filtered 1 L water sample through a C18 solid-phase extraction column, elution from the column with hexane-isopropyl alcohol (3 + 1), and concentration of the extract with nitrogen gas. The herbicide is quantitated by capillary/column GC/MS with selected-ion monitoring of 3 characteristic ions. The single-operator method detection limit for reagent water samples is 0.0015 ??g/L. Mean recoveries ranged from about 92 to 115% for 3 water matrixes fortified at 0.05 and 0.5 ??g/L. Average single-operator precision, over the course of 1 week, was better than 5%. |
| Genre: | Article |
| ProdID: | 70018563 |
| Citation Author: | Lindley, C. E.; Stewart, J. T.; Sandstrom, M. W. |
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| Citation End Page: | 966 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of AOAC International |
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| Citation Number Of Pages: | 5 |
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| Citation Search Results Text: | Determination of Low Concentrations of Acetochlor in Water by Automated Solid-Phase Extraction and Gas Chromatography with Mass-Selective Detection; 1996; Article; Journal; Journal of AOAC International; Lindley, C. E.; Stewart, J. T.; Sandstrom, M. W. |
| Citation Start Page: | 962 |
| Citation Volume: | 79 |
| Citation Year: | 1996 |
| Type: | citation/reference |
| Text: | Determination of Low Concentrations of Acetochlor in Water by Automated Solid-Phase Extraction and Gas Chromatography with Mass-Selective Detection; 1996; Article; Journal; Journal of AOAC International; Lindley, C. E.; Stewart, J. T.; Sandstrom, M. W. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1996 00:00 -0600 |
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