Development of passive sampler POCIS for analysis of polar pesticides in surface water

Abstract

The first time in Vietnam a passive sampling method has been developed to analyse the polar pesticides in surface water. The initial investigations of POCIS were performed for 7 polar pesticides as simazine,thiodicarb, carbofuran, chlortoluron, atrazine, isoproturon, and diuron. We determined  the sampling rates R_S for these substances ranged from 0.369 to 0.962 L day^-1. The obtained values of k_u and R_S showed the important influence of environmental factors such as flow on the ability to integrate polar pesticides in passive sampling process. This method can be applied to determine these 7 polar pesticides in surface water at trace levels according to European standards for pesticide residues in water (< 0.1 μg L^-1).