Polar organic chemical integrative samplers for pesticides monitoring: impacts of field exposure conditions.

摘要: Abstract This study focuses on how Polar Organic Chemical Integrative Samplers (POCIS) work in real environmental conditions. A selection of 23 polar pesticides and 8 metabolites were investigated by exposure triplicates integrative samplers two rivers France for successive 14-day periods. The trapped not only Oasis HLB sorbent but also the polyethersulfone (PES) membrane POCIS. distribution depended molecular structure. use Performance Reference Compound (PRC) is discussed here. impact some parameters setup transfer POCIS was studied: river flow rate, biofouling membranes, sampler holding design position stream. Results show a significant velocity PRC desorption, especially values higher than 4 cm·s − 1 . Some fouling observed PES which could potentially have an molecule accumulation Finally, positioning did effects pesticide accumulation, when perpendicular exposures used (sampler front water flow). with correction seems to be suitable tool estimating time-weighted average (TWA) concentrations, all molecules except one nine analyzed these French rivers.