An international intercomparison exercise on passive samplers (DGT) for monitoring metals in marine waters under a regulatory context
|Author(s)||Gonzalez Jean-Louis1, Amouroux Isabelle2, Guesdon Stephane3, Menet-Nedelec Florence4, Ponzevera Emmanuel2, Montero Natalia5, Marras Barbara5, Schintu Marco5, Caetano Miguel6, Correia Dos Santos Margarida7, Rodrigo Sanz Marta8, Millán Gabet Vanessa8, Rodríguez Jose German9, Belzunce-Segarra María Jesús9, Larreta Joana9, Menchaca Iratxe9, Bersuder Philippe10, Bolam Thi10, Regan Fiona11, White Blánaid11, Zhang Hao12|
|Affiliation(s)||1 : Ifremer, LITTORAL, Environmental Resources Laboratory (Provence-Azur-Corse), Zone Portuaire de Brégaillon, 83507 La Seyne/mer, France
2 : Ifremer, Unit of Biogeochemistry and Ecotoxicology, Rue de l'Ile d'Yeu, 44300 Nantes, France
3 : Ifremer, LITTORAL, Environmental Resources Laboratory (Pertuis Charentais), Avenue de Mus de Loup, 17390 La Tremblade, France
4 : Ifremer, LITTORAL, Environmental Resources Laboratory (Normandie), Avenue du Général de Gaulle, 14520 Port-en-Bessin, France
5 : UNICA, Dipartimento di Scienze Mediche e Sanità Pubblica, Università degli studi di Cagliari, 09124 Cagliari, Italy
6 : IPMA, Portuguese Institute of Sea and Atmosphere, Rua Alfredo Magalhães Ramalho, 6, 1495-165 Algés, Portugal
7 : Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Engenharia Química, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
8 : ITC, Instituto Tecnológico de Canarias, Playa de Pozo Izquierdo, s/n, CP: 35119 Sta. Lucía, Las Palmas, Spain
9 : AZTI, Marine Research Division, Herrera Kaia Portualdea z/g, 20110 Pasaia, Spain
10 : CEFAS, Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory, Pakefield Road, Lowestoft, Suffolk NR33 0HT, United Kingdom
11 : DCU Water Institute, Dublin City University, Dublin 9, Ireland
12 : Lancaster University, Lancaster Environment Centre, Lancaster LA1 4YQ, United Kingdom
|Source||Science Of The Total Environment (0048-9697) (Elsevier BV), 2022-11 , Vol. 847 , P. 157499 (10p.)|
|WOS© Times Cited||4|
|Keyword(s)||Interlaboratory exercise, Water framework directive, Passive sampling, DGT, Priority metals|
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.