Priority Issues in Coastal North Carolina: A Forum by the Coastal Society

Coastal Management, Год журнала: 2025, Номер unknown, С. 1 - 8

Опубликована: Янв. 30, 2025

Язык: Английский

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Per- and Polyfluoroalkyl Ether Acid (PFEA) Concentrations in Indoor Dust are Higher in Homes Closer to a Fluorochemical Manufacturing Facility

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Март 31, 2025

Concentrations of 48 per- and polyfluoroalkyl substances (PFAS) were measured in settled dust samples from 65 homes GenX Exposure Study participants residing near a fluorochemical manufacturing facility North Carolina. Eight PFAS [perfluoro(3,5-dioxahexanoic) acid (aka PFO2HxA), perfluoro-2-(perfluoromethoxy)propanoic (PMPA), perfluoro-2-ethoxypropanoic (PEPA), 6:2 fluorotelomer phosphate diester (6:2 diPAP), 6:2/8:2 (6:2/8:2 perfluoropropanoic (PFPrA), perfluorodecanesulfonic (PFDS), 2-(N-ethyl-perfluorooctanesulfonamido)acetic (N-EtFOSAA)] detected >90% the samples. Dust concentrations six ether acids (PFEAs) produced at (PEPA, PMPA, perfluoro-2-methoxyacetic (PFMOAA), PFO2HxA, hexafluoropropylene oxide dimer (HFPO-DA aka GenX), ethanesulfonic acid, 2-[1-[difluoro(1,2,2,2-tetrafluoroethoxy)methyl]-1,2,2,2- tetrafluoroethoxy]-1,1,2,2-tetrafluoro- (Nafion byproduct 2) significantly negatively associated with home distance facility. Homes closer to had higher summed mass 12 targeted PFEAs (∑12PFEAs) but not ∑48PFAS. Trifluoroacetic (TFA), an ultrashort chain PFAS, three diPAPs (8:2/6:2 diPAP, 8:2 diPAP) major contributors ∑48PFAS, these compounds did show relationships distance. Based on our previous findings associating well water human serum, current indicate could be important exposure source.

Язык: Английский

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Tissue-specific distribution and bioaccumulation of perfluoroalkyl acids, isomers, alternatives, and precursors in citrus trees of contaminated fields: Implication for risk assessment

Journal of Hazardous Materials, Год журнала: 2023, Номер 465, С. 133184 - 133184

Опубликована: Дек. 5, 2023

Язык: Английский

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Development and Application of a Liquid Chromatography–Tandem Mass Spectrometry Method for the Analysis of 20 Perfluoroalkyl Substances in Fruit and Vegetables at Sub-Parts-per-Trillion Levels

Journal of Agricultural and Food Chemistry, Год журнала: 2024, Номер 72(33), С. 18731 - 18741

Опубликована: Авг. 7, 2024

In response to the European Food Safety Authority's establishment of a tolerable weekly intake (TWI) for sum PFOA, PFNA, PFHxS, and PFOS, method was developed quantify confirm 20 PFASs at sub-parts-per-trillion level in fruit vegetables. Improved sensitivity achieved by (i) increasing sample intake, (ii) decreasing solvent volume final extract, (iii) using highly sensitive mass spectrometer. Except PFTrDA, target could be quantitatively determined with an apparent recovery 90–119%, limits quantitation down 0.5 ng/kg, relative standard deviation under within-laboratory reproducibility conditions <28%. The successfully applied 215 vegetable samples obtained from local grocery stores markets. Leafy vegetables prove main category responsible PFAS exposure, mainly followed PFHpA PFHxA.

Язык: Английский

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Fluorine-functionalized conjugated microporous polymer as adsorbents for solid-phase extraction of nine perfluorinated alkyl substances

Journal of Chromatography A, Год журнала: 2022, Номер 1681, С. 463457 - 463457

Опубликована: Авг. 30, 2022

Язык: Английский

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