Lessons learned from an intercalibration exercise on the quantification and characterisation of microplastic particles in sediment and water samples

Type Article
Date 2020-05
Language English
Author(s) Cadiou Jean-Francois1, Gerigny Olivia1, Koren Š.2, Zeri C.3, Kaberi H.3, Alomar C.4, Panti C.5, Fossi M.C.5, Adamopoulou A.3, Digka N.3, Deudero S.4, Concato M.4, Carbonell A.4, Baini M.5, Galli M.5, Galgani FrancoisORCID1
Affiliation(s) 1 : Institut Français de Recherche pour l'Exploitation de la Mer (Ifremer), Zone Portuaire de Bregaillon CS 20 330, La Seyne-sur-Mer 83507, France
2 : Institute for Water of the Republic of Slovenia (IWRS), Dunajska cesta 156, SI-1000 Ljubljana, Slovenia
3 : Hellenic Centre for Marine Research (HCMR), Institute of Oceanography, 19013 Anavyssos, Attica, Greece
4 : Instituto Español de Oceanografía, Centro Oceanográfico de Baleares, Muelle de Poniente s/n, 07015 Palma de Mallorca, Spain
5 : Department of Physical Sciences, Earth and Environment, University of Siena, Via P.A. Mattioli, 4, 53100 Siena, Italy
Source Marine Pollution Bulletin (0025-326X) (Elsevier BV), 2020-05 , Vol. 154 , P. 111097 (11p.)
DOI 10.1016/j.marpolbul.2020.111097
WOS© Times Cited 9
Keyword(s) Microplastics, Intercalibration, Protocols, Sediment, Seawater
Abstract

An intercalibration exercise on the characterisation of microplastics in marine sediment and water samples was carried out among five laboratories involved in the implementation of the Marine Strategy Framework Directive (MSFD) in their country. The samples were prepared by mixing cleaned natural sediment and sea water with microplastics sets made of particles of various polymers, shapes and colours. Overall, the errors on total counts were under 25% in absolute value. The risk of non-detection and loss of particles is greater than the risk of contamination during sample analysis. Significant differences are observed among particle types. It appears difficult to obtain reliable and comparable data on the colour of microplastics. A comparison of the errors with regards to the protocols used led to recommend NaCl [1.2 g/cm3] density separation for sediment and one filtering step (200 μm). The operators' experience appears as a key factor for the quality of the results.

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Cadiou Jean-Francois, Gerigny Olivia, Koren Š., Zeri C., Kaberi H., Alomar C., Panti C., Fossi M.C., Adamopoulou A., Digka N., Deudero S., Concato M., Carbonell A., Baini M., Galli M., Galgani Francois (2020). Lessons learned from an intercalibration exercise on the quantification and characterisation of microplastic particles in sediment and water samples. Marine Pollution Bulletin, 154, 111097 (11p.). Publisher's official version : https://doi.org/10.1016/j.marpolbul.2020.111097 , Open Access version : https://archimer.ifremer.fr/doc/00622/73397/