The influence of pH on the degradation kinetics of some organophosphorous pesticides in aqueous solutions.

This paper reports on the stability of 6 organophosphorous insecticides in ethanol-water at pH 2.0, 7.5 and 8.5. The kinetics of insecticide degradation and the corresponding parameters were calculated from the data obtained by analyses of the residual parental compounds. Pesticide degradation was found to proceed by 2 distinct mechanisms.