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Title: An international intercomparison exercise on passive samplers (DGT) for monitoring metals in marine waters under a regulatory context
Authors: Gonzalez, Jean-Louis; Amouroux, Isabelle; Guesdon, Stephane; Menet-Nedelec, Florence; Ponzevera, Emmanuel; Montero, Natalia; Schintu, Marco; Caetano, Miguel; Dos Santos, Margarida Correia; Sanz, Marta Rodrigo; Gabet, Vanessa Millan; Belzunce, Maria Jesus; Larreta, Joana; Menchaca, Iratxe; Bersuder, Philippe; Bolam, Thi; Regan, Fiona; Marras, Barbara; Rodriguez, Jose German; White, Blanaid; Zhang, Hao
Abstract: In order to move forward in the acceptance of a novel contaminant monitoring technique (Diffusive Gradients in Thin -films: DGT) for assessment of marine water bodies, sensu the WFD, an Inter-Laboratories Comparison (ILC) exercise (nine Europeans laboratories) was organized in the framework of the Interreg Atlantic Area MONITOOL project, which focused on the use of the DGT technique for the measurement of WFD priority metals (Cd, Ni and Pb). Reproducible results were obtained for each metal by several laboratories, supporting the assertion that DGT analysis can be performed satisfactorily by laboratories experienced in measuring metals at trace levels in marine environ-ments, even if they have limited practice in DGT analysis. According to the Z-score analysis, among the 9 participating laboratories, 3 had 100 \% of satisfactory results for Cd, Ni, and Pb, 3 had > 80 \% satisfactory results and 2 had about 60 \% satisfactory results. This work highlights the need to clearly describe the DGT method in order to control sources of contamination during analytical steps, in particular the resin gel retrieval and the elution steps. Such international intercomparison exercise is an important step to develop the laboratory network involved in DGT analysis and contributes to the improvement of data quality.
Keywords: Interlaboratory exercise; Water framework directive; Passive sampling; DGT; Priority metals; SITU SPECIATION MEASUREMENTS; DIFFUSIVE GRADIENTS; TRACE-METALS; THIN-FILMS; SURFACE WATERS; TOULON BAY; COASTAL; FRAMEWORK; NI; CU
Issue Date: 2022
Publisher: ELSEVIER
Type: Article
DOI: 10.1016/j.scitotenv.2022.157499
ISSN: 0048-9697
E-ISSN: 1879-1026
Funder: Interreg Atlantic Area Transnational Cooperation Programme
Appears in Publication types:Artículos científicos

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