Characterization of five passive sampling devices for monitoring of pesticides in water

Abstract Five different passive sampler devices were characterized under laboratory conditions for measurement of 124 legacy and current used pesticides in water. In addition, passive sampler derived time-weighted average (TWA) concentrations were compared to time-integrated active sampling in the field. Sampling rates ( R S ) and passive sampler-water partition coefficients ( K PW ) were calculated for individual pesticides using silicone rubber (SR), polar organic chemical integrative sampler (POCIS)-A, POCIS-B, Chemcatcher ® SDB-RPS and Chemcatcher ® C 18 . The median R S (L day −1 ) decreased as follows: SR (0.86) > POCIS-B (0.22) > POCIS-A (0.18) > Chemcatcher ® SDB-RPS (0.05) > Chemcatcher ® C 18 (0.02), while the median log  K PW (L kg −1 ) decreased as follows: POCIS-B (4.78) > POCIS-A (4.56) > Chemcatcher ® SDB-RPS (3.17) > SR (3.14) > Chemcatcher ®  C 18 (2.71). The uptake of the selected compounds depended on their physicochemical properties, i.e. SR showed a better uptake for more hydrophobic compounds (log octanol–water partition coefficient ( K OW ) > 5.3), whereas POCIS-A, POCIS-B and Chemcatcher ® SDB-RPS were more suitable for hydrophilic compounds (log  K OW K OW 's in water.