FN Archimer Export Format PT J TI Metal measurement in aquatic environments by passive sampling methods: Lessons learning from an in situ intercomparison exercise BT AF DABRIN, A. GHESTEM, J. -P. UHER, E. GONZALEZ, Jean-Louis ALLAN, I. J. SCHINTU, M. MONTERO, N. BALAAM, J. PEINERUD, E. MIEGE, C. COQUERY, M. AS 1:1;2:2;3:3;4:4;5:5;6:6;7:7;8:8;9:9;10:1;11:1; FF 1:;2:;3:;4:PDG-RBE-BE-LBCM;5:;6:;7:;8:;9:;10:;11:; C1 Irstea, UR MALY, Freshwater Syst Ecol & Pollut Res Unit, F-69626 Villeurbanne, France. Bur Rech Geol & Minieres, Orleans 2, France. Irstea, UR HBAN, F-92163 Antony, France. IFREMER, Dept Biogeochim & Ecotoxicol, F-83507 La Seyne Sur Mer, France. Norwegian Inst Water Res NIVA, N-0349 Oslo, Norway. Univ Cagliari, Cagliari, Italy. AZTI Tecnalia, Div Marine Res, Pasaia 20110, Spain. Cefas, Lowestoft Lab, Lowestoft, Suffolk, England. ALS Scandinavia, SE-18325 Taby, Sweden. C2 IRSTEA, FRANCE BRGM, FRANCE IRSTEA, FRANCE IFREMER, FRANCE NIVA, NORWAY UNIV CAGLIARI, ITALY AZTI, SPAIN CEFAS, UK ALS SCANDINAVIA, SWEDEN SI TOULON SE PDG-RBE-BE-LBCM IN WOS Ifremer jusqu'en 2018 copubli-france copubli-p187 copubli-europe IF 5.099 TC 27 UR https://archimer.ifremer.fr/doc/00294/40560/39614.pdf LA English DT Article DE ;DGT;Uncertainty;Blank;Continental waters;Coastal waters AB Passive sampling devices (PS) are widely used for pollutant monitoring in water, but estimation of measurement uncertainties by PS has seldom been undertaken. The aim of this work was to identify key parameters governing PS measurements of metals and their dispersion. We report the results of an in situ intercomparison exercise on diffusive gradient in thin films (DGT) in surface waters. Interlaboratory uncertainties of time-weighted average (TWA) concentrations were satisfactory (from 28% to 112%) given the number of participating laboratories (10) and ultra-trace metal concentrations involved. Data dispersion of TWA concentrations was mainly explained by uncertainties generated during DGT handling and analytical procedure steps. We highlight that DGT handling is critical for metals such as Cd, Cr and Zn, implying that DGT assembly/dismantling should be performed in very clean conditions. Using a unique dataset, we demonstrated that DGT markedly lowered the LOQ in comparison to spot sampling and stressed the need for accurate data calculation. PY 2016 PD JAN SO Environmental Pollution SN 0269-7491 PU Elsevier Sci Ltd VL 208 UT 000368306500001 BP 299 EP 308 DI 10.1016/j.envpol.2015.08.049 ID 40560 ER EF