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A multi-platform approach for the comprehensive analysis of per- and polyfluoroalkyl substances (PFAS) and fluorine mass balance in commercial ski wax products
University of Graz, Austria.ORCID iD: 0000-0002-9806-9633
Stockholm University, Sweden.
University of Graz, Austria.ORCID iD: 0000-0003-3880-9385
University of Graz, Austria.
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2024 (English)In: Analytica Chimica Acta, ISSN 0003-2670, E-ISSN 1873-4324, Vol. 1314, article id 342754Article in journal (Refereed) Published
Abstract [en]

The unique properties of per- and polyfluoroalkyl substances (PFAS) have led to their extensive use in consumer products, including ski wax. Based on the risks associated with PFAS, and to align with PFAS regulations, the international ski federation (FIS) implemented a ban on products containing “C8 fluorocarbons/perfluorooctanoate (PFOA)” at all FIS events from the 2021/2022 season, leading manufactures to shift their formulations towards short-chain PFAS chemistries. To date, most studies characterising PFAS in ski waxes have measured a suite of individual substances using targeted analytical approaches. However, the fraction of total fluorine (TF) in the wax accounted for by these substances remains unclear. In this study, we sought to address this question by applying a multi-platform, fluorine mass balance approach to a total of 10 commercially available ski wax products. Analysis of TF by combustion ion chromatography (CIC) revealed concentrations of 1040–51700 μg F g−1 for the different fluorinated waxes. In comparison, extractable organic fluorine (EOF) determined in methanol extracts by CIC (and later confirmed by inductively-coupled plasma-mass spectrometry and 19F- nuclear magnetic resonance spectroscopy) ranged from 92 to 3160 μg g−1, accounting for only 3–8.8 % of total fluorine (TF). Further characterisation of extracts by cyclic ion mobility-mass spectrometry (IMS) revealed 15 individual PFAS with perfluoroalkyl carboxylic acid concentrations up to 33 μg F g−1, and 3 products exceeding the regulatory limit for PFOA (0.025 μg g−1) by a factor of up to 100. The sum of all PFAS accounted for only 0.01–1.0 % of EOF, implying a high percentage of unidentified PFAS, thus, pyrolysis gas chromatography-mass spectrometry was used to provide evidence of the nature of the non-extractable fluorine present in the ski wax products. 

Place, publisher, year, edition, pages
Elsevier B.V. , 2024. Vol. 1314, article id 342754
Keywords [en]
Consumer products; Gas chromatography; Inductively coupled plasma mass spectrometry; Ion chromatography; Mass spectrometers; Nuclear magnetic resonance spectroscopy; Pyrolysis; fluorine; fluorine derivative; per- and polyfluoroalkyl substance; ski wax; unclassified drug; wax; 19F NMR; Combustion ion chromatography; Fluorine mass balance; ICP-MS; Mass balance; Polyfluoroalkyl substances; Pyrolysis-gc-ms; Ski wax; Target polyfluoroalkyl substance; Total fluorine; Article; chemical composition; combustion ion chromatography; electrospray; flow rate; fluorine nuclear magnetic resonance; high performance liquid chromatography; inductively coupled plasma mass spectrometry; ion chromatography; limit of detection; limit of quantitation; mass fragmentography; mass spectrometry; pyrolysis; pyrolysis gas chromatography mass spectrometry; Fluorine
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:ri:diva-73586DOI: 10.1016/j.aca.2024.342754Scopus ID: 2-s2.0-85194895736OAI: oai:DiVA.org:ri-73586DiVA, id: diva2:1872431
Note

 RGV thanks Faculty of Science Uni Graz and the NAWI visiting program, VM thanks Macaulay Development Trust, LS thanks the project “POPFREE Industry – Towards a PFAS-free and circular industry” with funding from VINNOVA (grant number 2021-04200). Funding by the Land Steiermark Zukunftsfonds (project grand 1109 “Frontier NMR”) is also gratefully acknowledge. The authors acknowledge the financial support by the University of Graz. 

Available from: 2024-06-18 Created: 2024-06-18 Last updated: 2025-09-23Bibliographically approved

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Reimann, AndersSkedung, Lisa

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