Alteration of pesticide content in the soil solution collected by a porous cup
1994
Perrin-Ganier, Corinne | Schiavon, Michel | Portal, Jean-Michel | Babut, M. | Breuzin, C. | Laboratoire Sols et Environnement (LSE) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | Centre National de la Recherche Scientifique (CNRS) | Agence de l'Eau Rhin-Meuse
Investigations were conducted to test the suitability of porous cups for sampling soil water to determine pesticides. Pesticide contents were controlled over a sampling period in an aqueous medium containing soluble organic matter and in a soil medium treated with atrazine or isoproturon both 14C-labelled. The tests proved that the disturbance of pesticide concentration in the extracted water concerned only the first volume extracted (fifty milliliters). Thus, the resulting 500 ml sample had a herbicide content close to that of the corresponding leachate. The system still worked well after a dessication period or a simulated rainfall. These results confirmed clearly the usefulness of porous cups for pesticide monitoring campaigns provided the samples volume is superior to 50 ml.
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