Interlaboratory Comparison Reveals State of the Art in Microplastic Detection and Quantification Methods

Dmitri Ciornii, Vasile Dan Hodoroaba, Nizar Benismail, Alina Maltseva, Juan F. Ferrer, Jiamin Wang, Raquel Parra, Ronan Jézéquel, Justine Receveur, Dina Gabriel, Andreas Scheitler, Christa van Oversteeg, Jorg Roosma, Alex van Renesse van Duivenbode, Tim Bulters, Michela Zanella, Alessandro Perini, Federico Benetti, Dora Mehn, Georg DierkesMichael Soll, Takahisa Ishimura, Marius Bednarz, Guyu Peng, Lars Hildebrandt, Mathias Peters, Seung Kyu Kim, Jochen Türk, Felix Steinfeld, Jaehak Jung, Sanghee Hong, Eun Ju Kim, Hye Weon Yu, Sven Klockmann, Christoph Krafft, Julia Süssmann, Shan Zou, Alexandra ter Halle, Andrea M. Giovannozzi, Alessio Sacco, Marta Fadda, Mara Putzu, Dong Hoon Im, Nontete Nhlapo, Priscilla Carrillo-Barragán, Natascha Schmidt, Dorte Herzke, Alessio Gomiero, Adrián Jaén-Gil, Damien J.E. Cabanes, Martin Doedt, Vitor Cardoso, Antje Schmitz, Moritz Hawly, Huajuan Mo, Justine Jacquin, Andy Mechlinski, Gbotemi A. Adediran, Jose Andrade, Soledad Muniategui-Lorenzo, Anja Ramsperger, Martin G.J. Löder, Christian Laforsch, Tanja Cirkovic Velickovic, Daniele Fabbri, Irene Coralli, Stefania Federici, Barbara M. Scholz-Böttcher, Jacopo la Nasa, Greta Biale, Cassandra Rauert, Elvis D. Okoffo, Anna Undas, Lihui An, Volker Wachtendorf, Petra Fengler, Korinna Altmann

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In this study, we investigate the current accuracy of widely used microplastic (MP) detection methods through an interlaboratory comparison (ILC) involving ISO-approved techniques. The ILC was organized under the prestandardization platform of VAMAS (Versailles Project on Advanced Materials and Standards) and gathered a large number (84) of analytical laboratories across the globe. The aim of this ILC was (i) to test and to compare two thermo-analytical and three spectroscopical methods with respect to their suitability to identify and quantify microplastics in a water-soluble matrix and (ii) to test the suitability of the microplastic test materials to be used in ILCs. Two reference materials (RMs), polyethylene terephthalate (PET) and polyethylene (PE) as powders with rough size ranges between 10 and 200 μm, were used to press tablets for the ILC. The following parameters had to be assessed: polymer identity, mass fraction, particle number concentration, and particle size distribution. The reproducibility, SR, in thermo-analytical experiments ranged from 62%-117% (for PE) and 45.9%-62% (for PET). In spectroscopical experiments, the SR varied between 121% and 129% (for PE) and 64% and 70% (for PET). Tablet dissolution turned out to be a very challenging step and should be optimized. Based on the knowledge gained, development of guidance for improved tablet filtration is in progress. Further, in this study, we discuss the main sources of uncertainties that need to be considered and minimized for preparation of standardized protocols for future measurements with higher accuracy.

Original languageEnglish
Pages (from-to)8719-8728
Number of pages10
JournalAnalytical Chemistry
Volume97
Issue number16
DOIs
StatePublished - 29 Apr 2025

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