| Abstract: | A multi-residue method is described for the determination of triazine herbicides in natural water samples. The technique uses solvent extraction followed by gas chromatographic separation and detection employing nitrogen-selective devices. Seven compounds can be determined simultaneously at a nominal detection limit of 0.1 ??g/L in a 1-litre sample. Three different natural water samples were used for error analysis via evaluation of recovery efficiencies and estimation of overall method precision. As an alternative to liquid-liquid partition (solvent extraction) for removal of compounds of interest from water, solid-phase extraction (SPE) techniques employing chromatographic grade silicas with chemically modified surfaces have been examined. SPE is found to provide rapid and efficient concentration with quantitative recovery of some triazine herbicides from natural water samples. Concentration factors of 500 to 1000 times are obtained readily by the SPE technique.A multi-residue method is described for the determination of triazine herbicides in natural water samples. The technique uses solvent extraction followed by gas chromatographic separation and detection employing nitrogen-selective devices. Seven compounds can be determined simultaneously at a nominal detection limit of 0. 1 mu g/L in a 1-litre sample. As an alternative to liquid-liquid partition (solvent extraction) for removal of compounds of interest from water, solid-phase extraction (SPE) techniques employing chromatographic grade silicas with chemically modified surfaces have been examined. SPE is found to provide rapid and efficient concentration with quantitative recovery of some triazine herbicides from natural water samples. Concentration factors of 500 to 1000 times are obtained readily by the SPE technique. |
| Genre: | Article |
| ProdID: | 70013357 |
| Citation Author: | Steinheimer, T. R.; Brooks, M. G. |
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| Citation End Page: | 111 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | International Journal of Environmental Analytical Chemistry |
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| Citation Number Of Pages: | 15 |
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| Citation Search Results Text: | Development and evaluation of a gas chromatographic method for the determination of triazine herbicides in natural water samples; 1984; Article; Journal; International Journal of Environmental Analytical Chemistry; Steinheimer, T. R.; Brooks, M. G. |
| Citation Start Page: | 97 |
| Citation Volume: | 17 |
| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | Development and evaluation of a gas chromatographic method for the determination of triazine herbicides in natural water samples; 1984; Article; Journal; International Journal of Environmental Analytical Chemistry; Steinheimer, T. R.; Brooks, M. G. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1984 00:00 -0600 |
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