title: Polar organic chemical integrative sampler (POCIS) uptake rates for 17 polar pesticides and degradation products: laboratory calibration.
abstract: Polar organic chemical integrative samplers (POCIS) are useful for monitoring a wide range of chemicals, including polar pesticides, in water bodies. However, few calibration data are available, which limits the use of these samplers for time-weighted average concentration measurements in an aquatic medium. This work deals with the laboratory calibration of the pharmaceutical configuration of a polar organic chemical integrative sampler (pharm-POCIS) for calculating the sampling rates of 17 polar pesticides (1.15 ≤  logK(ow) ≤ 3.71) commonly found in water. The experiment, conducted for 21 days in a continuous water flow-through exposure system, showed an integrative accumulation of all studied pesticides for 15 days. Three compounds (metalaxyl, azoxystrobine, and terbuthylazine) remained integrative for the 21-day experiment. The sampling rates measured ranged from 67.9 to 279 mL day(-1) and increased with the hydrophobicity of the pesticides until reaching a plateau where no significant variation in sampling rate is observed when increasing the hydrophobicity.
authors.affiliation: Laboratory Division, Bureau de recherche géologiques et minières (BRGM), 3 avenue Claude Guillemin, 45100, Orléans, France. i.imtiaz@mines-ales.fr
authors.forename: Imtiaz
authors.initials: I
authors.lastname: Ibrahim
authors.forename: Anne
authors.initials: A
authors.lastname: Togola
authors.forename: Catherine
authors.initials: C
authors.lastname: Gonzalez
mesh_terms: D002138:Calibration; D055598:Chemical Phenomena; D004784:Environmental Monitoring / Q000379:methods; D005069:Evaluation Studies as Topic; D006863:Hydrogen-Ion Concentration; D057927:Hydrophobic and Hydrophilic Interactions; D007700:Kinetics; D009930:Organic Chemicals / Q000032:analysis* / Q000737:chemistry; D010575:Pesticides / Q000032:analysis* / Q000737:chemistry; D018401:Sample Size; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D009930:Organic Chemicals; D010575:Pesticides; D014874:Water Pollutants, Chemical; D014867:Water