An in situ intercomparison exercise on passive samplers for the monitoring priority substances : results for metals
Exercice d'intercomparaison sur les échantillonneurs passifs pour la surveillance des substances prioritaires : résultats pour les contaminants métalliques
Résumé
An intercomparison exercise on passive samplers (PSs) was organized in summer 2010 for the measurement of selected metals in surface waters. Various PSs were used and compared at one river site and one marine lagoon. A total of 11 laboratories participated. We present the first outputs from this exercise, including discussion on quality control, the interlaboratory variability of field blanks for metals with DGT, time weighted average water concentrations and its variability, the representativity of DGT samples and the ability of PSs to lower limits of detection. These in situ intercomparison exercises should enable to progress on the harmonization of practices for the use of passive sampling, especially for priority chemical monitoring and regulatory programs in compliance with the WFD.