Stability of isoproturon, bentazone, terbuth7lazine and alachlor in natural groundwater, surface water and soil water samples stored under laboratory conditions

摘要

Te stability of isoproturon, bentazone, terbuthylazine and alachlor was investigated in groundwater (GrW), surface water (SuW) and soil water from the unsaturated zone (SoW). Samples forified with a low spiking level (LSL) of about 0.3-0.5 μg/L and a high spiking level (HSL) of about 0.9-1.3 μg/L were stored for 1,2,14 (GrW) and 30 days (SuW and SoW) at 4 deg.C in amber glass bottles without biological inhibition. The initial pesticide concentration played a significant role, the lowest concentrations being the least stable for all pesticides.