Determination of low concentrations of acetochlor in water by automated solid-phase extraction and gas chromatography with mass-selective detection
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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 μg/L Mean recoveries ranged from about 92 to 115% for 3 water matrixes fortified at 0.05 and 0.5 μg\L. Average single-operator precision, over the course of 1 week, was better than 5%.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Determination of low concentrations of acetochlor in water by automated solid-phase extraction and gas chromatography with mass-selective detection |
| Series title | Journal of AOAC International |
| DOI | 10.1093/jaoac/79.4.962 |
| Volume | 79 |
| Issue | 4 |
| Year Published | 1996 |
| Language | English |
| Publisher | Oxford Academic |
| Contributing office(s) | National Water Quality Laboratory |
| Description | 5 p. |
| First page | 962 |
| Last page | 966 |
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