How Do We Measure Poly- and Perfluoroalkyl Substances (PFASs) at the Surface of Consumer Products?
| Autor: | Joseph G. Allen, Elsie M. Sunderland, Andrea K Tokranov, Chad D. Vecitis, Nicole Nishizawa, Carlo A. Amadei, Heidi M. Pickard, Jenny E. Zenobio |
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| Rok vydání: | 2018 |
| Předmět: |
Food contact materials
Ecology Health Toxicology and Mutagenesis Depth dependent 010401 analytical chemistry chemistry.chemical_element 010501 environmental sciences Mass spectrometry 01 natural sciences Pollution 0104 chemical sciences Food packaging chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Environmental chemistry Fluorine Environmental Chemistry Atomic ratio Methanol Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Environmental Science & Technology Letters. 6:38-43 |
| ISSN: | 2328-8930 |
| DOI: | 10.1021/acs.estlett.8b00600 |
| Popis: | Exposures to poly- and perfluoroalkyl substances (PFASs) have been linked to metabolic disruption, immunotoxicity and cancer in humans. PFASs are known to be present in diverse consumer products including textiles and food packaging. Here we present a new method for quantifying the atomic percent fluorine (% F) in the surficial 0.01 μm of consumer products using X-ray photoelectron spectroscopy (XPS). The surface of food contact materials and textiles measured in this study contained up to 28% F and 45% F, respectively. PTFE tape was measured to demonstrate XPS accuracy and precision. Depth profiles of fluorine content in consumer products measured using XPS showed highest levels at the upper-most surface in contact with the surrounding environment and a decrease below the surface. PFASs released in methanol extracts and quantified using traditional liquid chromatography-tandem mass spectrometry typically accounted for |
| Databáze: | OpenAIRE |
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