TitlePaints: A Source of Volatile PFAS in Air─Potential Implications for Inhalation Exposure.
Publication TypeJournal Article
Year of Publication2022
AuthorsCahuas L, Muensterman DJ, Kim-Fu ML, Reardon PN, Titaley IA, Field JA
JournalEnviron Sci Technol
Volume56
Issue23
Pagination17070-17079
Date Published2022 Dec 06
ISSN1520-5851
KeywordsChild, Fluorine, Fluorocarbons, Gas Chromatography-Mass Spectrometry, Humans, Inhalation Exposure, Paint
Abstract

Paints are widely used in indoor settings yet there are no data for volatile per- and polyfluoroalkyl substances (PFAS) for paints or knowledge if paints are potentially important sources of human exposure to PFAS. Different commercial paints ( = 27) were collected from local hardware stores and analyzed for volatile PFAS by gas chromatography-mass spectrometry (GC-MS), nonvolatile PFAS by liquid chromatography-quadrupole time-of-flight mass spectrometry (LC-qTOF), and total fluorine by F nuclear magnetic resonance spectroscopy (NMR). Diluted paint required clean up to remove 6:2 fluorotelomer phosphate diester (diPAP), which thermally transforms into 6:2 FTOH at 280 °C (GC inlet temperature). Only 6:2 FTOH (0.9-83 μg/g) and 6:2 diPAP (0.073-58 μg/g) were found in five exterior and nine interior paints and only accounted for a maximum of 17% of total fluorine. Upon drying, 40% of the FTOH mass was lost, and the loss was verified by measurements of the cumulative FTOH mass measured in the air of a small, confined space over a 3 h period. Based on the liquid paint results, the ConsExpo model was used for potential exposure assessment and one commercial paint exceeded the chosen reference dose (5 μg/kg-day) for children and adults, indicating the potential for human exposure during painting.

DOI10.1021/acs.est.2c04864
Alternate JournalEnviron Sci Technol
PubMed ID36367233