Article Dans Une Revue Atmospheric Measurement Techniques Année : 2025

An interlaboratory comparison to quantify oxidative potential measurement in aerosol particles: challenges and recommendations for harmonisation

1 IGE - Institut des Géosciences de l’Environnement
2 JRC - European Commission - Joint Research Centre [Ispra]
3 NOA - National Observatory of Athens
4 King‘s College London
5 LAPI - Laboratory of Atmospheric Processes and their Impacts
6 PSI - Paul Scherrer Institute
7 AOS - Department of Atmospheric and Oceanic Sciences [Los Angeles]
8 Imperial College London
9 CERI EE - IMT Nord Europe - Centre for Energy and Environment
10 TROPOS - Leibniz Institute for Tropospheric Research
11 Unibas - Université de Bâle = University of Basel = Basel Universität
12 TNO - The Netherlands Organisation for Applied Scientific Research
13 Dipartimento di Scienze Chimiche e Farmaceutiche [Ferrara, Italy]
14 UNIL - Université de Lausanne = University of Lausanne
15 Institute of Chemical Engineering Sciences, ICE-HT, Patras
16 MPIC - Max Planck Institute for Chemistry
17 Unisanté - Centre universitaire de médecine générale et santé publique
18 UIUC - University of Illinois at Urbana-Champaign [Urbana]
19 Department of Computer Applications and Science, School of Management and Science, Lucknow, 226027, India.
20 Key Laboratory of Genomic and Precision Medicine [Beijing, China]
21 Georgia Institute of Technology [Atlanta]
22 School of Earth and Atmospheric Sciences [Atlanta]
23 IDAEA - Institute of Environmental Assessment and Water Research
24 Universiteit Utrecht / Utrecht University [Utrecht]
25 INAR - Institute for Atmospheric and Earth System Research
26 King Abdulaziz University
27 IRD - Institut de Recherche pour le Développement
Hana Cigánková
  • Fonction : Auteur
Daniele Contini
Greg Evans
Drew A Glencross
Maria Rachele Guascito
Saima Iram
  • Fonction : Auteur
Maja Jovanović
Milena Jovašević-Stojanović
  • Fonction : Auteur
Suzanne E Paulson
  • Fonction : Auteur
Anil Patel
  • Fonction : Auteur
Pavel Mikuška
  • Fonction : Auteur
Eduardo J S Souza
Sarah Steimer
Svetlana Stevanovic
Battist Utinger
Marloes F van Os
  • Fonction : Auteur

Résumé

This paper presents the findings from a collaborative interlaboratory comparison exercise designed to assess oxidative potential (OP) measurements conducted by 20 laboratories worldwide. This study represents an innovative effort as the first exercise specifically aimed at harmonising this type of OP assay, setting a new benchmark in the field. Over the last decade, there has been a noticeable increase in OP studies, with numerous research groups investigating the effects of exposure to air pollution particles through the evaluation of OP levels. However, the absence of standardised methods for OP measurements has resulted in variability in results across different groups, rendering meaningful comparisons challenging. To address this issue, this study engages in an international effort to compare OP measurements using a simplified method (with a dithiothreitol (DTT) assay). Here, we quantify the OP in liquid samples to focus on the protocol measurement itself, while future ILCs should aim to assess the full-chain process, including the sample extraction. We analyse the similarities and discrepancies observed in the results, identifying the critical parameters (such as the instrument used, the use of a simplified protocol, the delivery and analysis time) that could influence OP measurements, and provide recommendations for future studies and interlaboratory comparisons. Even if other crucial aspects, such as sampling PM methods, sample storage, extraction methods and conditions, and the evaluation of other OP assays, still need to be standardised. This collaborative approach enhances the robustness of the OP-DTT assay and paves the way for future studies to build on a unified framework. This pioneering work concludes that interlaboratory comparisons provide essential insights into the OP metric and are crucial to move toward the harmonisation of OP measurements.

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hal-04661735 , version 1 (25-07-2024)

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Pamela A Dominutti, Jean-Luc Jaffrezo, Anouk Marsal, Takoua Mhadhbi, Rhabira Elazzouzi, et al.. An interlaboratory comparison to quantify oxidative potential measurement in aerosol particles: challenges and recommendations for harmonisation. Atmospheric Measurement Techniques, 2025, 18 (1), pp.177-195. ⟨10.5194/amt-18-177-2025⟩. ⟨hal-04661735⟩
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