Polar organic chemical integrative sampler (POCIS) uptake rates for 17 polar pesticides and degradation products: laboratory calibration

Imtiaz Ibrahim (1, 2) , Anne Togola (1) , Catherine Gonzalez (2)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 LGI2P - Laboratoire de Génie Informatique et Ingénierie de Production

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.

Mots clés: Laboratory calibration; Passive sampling; POCIS; Polar pesticides

Domaines: Ingénierie de l'environnement; Chimie analytique

Imtiaz Ibrahim, Anne Togola, Catherine Gonzalez. Polar organic chemical integrative sampler (POCIS) uptake rates for 17 polar pesticides and degradation products: laboratory calibration. Environmental Science and Pollution Research, 2012, pp.1-9. ⟨10.1007/s11356-012-1284-3⟩. ⟨hal-00749855v1⟩