Determination of dinitroaniline herbicides in environmental samples by gas chromatography
Simultaneous determination of several dinitroaniline herbicides in environmental samples (soil, plant and air) was performed by gas chromatography with ion trap and nitrogen-phosphorus detection. Soil was extracted with ethyl acetate on an orbit shaker and plants were extracted with methanol in a Sorvall homogenizer. The plant extract was purified on a Florisil column before gas chromatographic analysis. The dinitroaniline herbicides volatilized from soil were trapped on a Florisil column, eluted with acetone and then analyzed by gas chromatography. The concentrations of these compounds were determined by gas chromatography with nitrogen-phosphorus detection on a HP-1 capillary column and with ion trap detection on a BP-1 capillary column. Helium was used as carrier gas. In all cases, the average recoveries were higher than 75%. The limit of detection for these herbicides was, at least, 0.01 μg/g in soil, 0.05 μg/g in plant and 1 ng/l in air with both gas chromatographic methods.
| Main Authors: | , , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Elsevier
1996
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| Online Access: | http://hdl.handle.net/20.500.12792/1636 http://hdl.handle.net/10261/292891 |
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