An international intercomparison exercise on passive samplers (DGT) for monitoring metals in marine waters under a regulatory context

Gonzalez, Jean Louis and Amouroux, Isabelle and Guesdon, Stephane and Menet-Nedelec, Florence and Ponzevera, Emmanuel and Montero, Natalia and Marras, Barbara and Schintu, Marco and Caetano, Miguel and Correia Dos Santos, Margarida and Rodrigo Sanz, Marta and Millán Gabet, Vanessa and Rodríguez Jose, German and Belzunce-Segarra, María Jesús and Larreta, Joana and Menchaca, Iratxe and Bersuder, Philippe and Bolam, Thi and Regan, Fiona and White, Blánaid and Zhang, Hao (2022) An international intercomparison exercise on passive samplers (DGT) for monitoring metals in marine waters under a regulatory context. Science of the Total Environment, 847: 157499. ISSN 0048-9697

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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 environments, 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.

Item Type:
Journal Article
Journal or Publication Title:
Science of the Total Environment
Uncontrolled Keywords:
?? dgtinterlaboratory exercisepassive samplingpriority metalswater framework directiveenvironmental engineeringenvironmental chemistrywaste management and disposalpollution ??
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Deposited On:
18 May 2023 12:30
Last Modified:
15 Jul 2024 23:04