TY - JOUR

T1 - An international intercomparison exercise on passive samplers (DGT) for monitoring metals in marine waters under a regulatory context

AU - Gonzalez, Jean Louis

AU - Amouroux, Isabelle

AU - Guesdon, Stephane

AU - Menet-Nedelec, Florence

AU - Ponzevera, Emmanuel

AU - Montero, Natalia

AU - Marras, Barbara

AU - Schintu, Marco

AU - Caetano, Miguel

AU - Correia Dos Santos, Margarida

AU - Rodrigo Sanz, Marta

AU - Millán Gabet, Vanessa

AU - Rodríguez Jose, German

AU - Belzunce-Segarra, María Jesús

AU - Larreta, Joana

AU - Menchaca, Iratxe

AU - Bersuder, Philippe

AU - Bolam, Thi

AU - Regan, Fiona

AU - White, Blánaid

AU - Zhang, Hao

PY - 2022/11/15

Y1 - 2022/11/15

N2 - 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.

AB - 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.

KW - DGT

KW - Interlaboratory exercise

KW - Passive sampling

KW - Priority metals

KW - Water framework directive

U2 - 10.1016/j.scitotenv.2022.157499

DO - 10.1016/j.scitotenv.2022.157499

M3 - Journal article

C2 - 35870601

AN - SCOPUS:85135789266

VL - 847

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

M1 - 157499

ER -