Journal or Publishing Institution: Science of the Total Environment
Study: https://www.ncbi.nlm.nih.gov/pubmed/11346036
Author(s): Veiga, F., Zapata, J.M., Marcos, M.F. and Alvarez, E.
Article Type: Peer Reviewed Study
Record ID: 807
Abstract: 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.
Keywords: Glyphosate, Aminomethylphosphonic acid, Herbicide, Persistence, Forest soil
Citation: Veiga, F., Zapata, J.M., Marcos, M.F. and Alvarez, E., 2001. Dynamics of glyphosate and aminomethylphosphonic acid in a forest soil in Galicia, north-west Spain. Science of the Total Environment, 271(1-3), pp.135-144.
