Dynamics of glyphosate and aminomethylphosphonic acid in a forest soil in Galicia, north-west Spain
| Autor: | F Veiga, E. Álvarez, J.M Zapata, M. L. Fernández Marcos |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Hydrology
Environmental Engineering Soil test Chemistry Herbicides Metabolite Glycine Pesticide Residues Pesticide Pollution High-performance liquid chromatography Soil contamination Trees chemistry.chemical_compound Spain Glyphosate Environmental chemistry Soil water Environmental Chemistry Soil Pollutants Aminomethylphosphonic acid Waste Management and Disposal Environmental Monitoring |
| Zdroj: | The Science of the total environment. 271(1-3) |
| ISSN: | 0048-9697 |
| Popis: | Residues of the herbicide glyphosate (N-phosphonomethylglicine) and its main metabolite, aminomethylphosphonic acid (AMPA), were determined in a forest soil in north-west Spain, previously treated with 5 and 8 l ha(-1) of glyphosate. Both products were monitored in the solid and liquid soil phases for an 8-week period after the treatment. Soil samples were extracted by KH2PO4. Concentrated extracts and liquid phase samples were derivatized with 9-fluorenylmethyl chloroformate (FMOC) before determination by HPLC using an anion exchange column and spectrofluorometric detection. The treated soil peaked at 6.9 microg g(-1) of glyphosate, whereas soil water samples peaked at 0.74 microg ml(-1) of glyphosate. One month after the treatment, both glyphosate and AMPA concentrations in soil and water samples were almost negligible. AMPA peaked at 0.77 microg ml(-1) in soil water samples. Glyphosate and AMPA exhibited high vertical mobility in the treated soil, quickly reaching high concentrations in subsurface horizons where the degradation is slower. |
| Databáze: | OpenAIRE |
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