[Report] Screening of Poly- and Perfluoroalkyl Substances (PFASs) and Extractable Organic Fluorine (EOF) in the Blood of Highly Exposed People

By Rudolf Aro, Anna Kärrman, Leo Yeung, Christian Lindh, and Kristina Jakobsson
Swedish Environ. Prot. Agency
August 26, 2020

This report summarises the findings of an investigation into the occurrence of poly- and perfluoroalkyl substances (PFASs) in the whole blood of people living in the municipality of Ronneby. A total of 20 whole blood samples from individuals who have known to been expose to PFASs via consumption of PFAS contaminated drinking water were analysed in this study. Using both liquid and supercritical chromatography coupled with tandem mass spectrometers a total of 63 PFASs were analysed. These results were then compared with extractable organofluorine (EOF) levels measured with combustion ion chromatography. The data from both target PFAS analysis and EOF was used to perform fluorine mass balance analysis. In general, the PFAS profile was dominated by long-chain perfluoroalkyl sulfonates (PFSAs with more than 6 fluorinated carbons), on average accounting for 97% of the total PFAS budget. The second most prominent PFAS class were long-chain perfluoroalkyl carboxylates (PFCAs with more than 7 fluorinated carbons), accounting for an additional 2.6% of the PFAS exposure. The average sum PFAS concentrations was 346 ng/g (from 74.1 ng/g to 715 ng/g). The average EOF concentration was 186 ng F/g and 79% of the EOF was explained by the target analytes.

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