期刊
ANALYTICA CHIMICA ACTA
卷 988, 期 -, 页码 41-49出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2017.08.016
关键词
Non-targeted identification; Emerging polyfluoroalkyl substances; Non-ionic PFASs; Cationic PFASs; Zwitterionic PFASs; Adducts
资金
- University of North Dakota Vice President of Research & Economic Development Faculty Early Career Award [20622-4000-02545]
- NIH [5P30GM103329-05]
- Office of Integrative Activities
- Office Of The Director [1355466] Funding Source: National Science Foundation
Poly- and perfluoroalkyl substances (poly- and per-PFASs) are a large group of organic compounds that have become the target of investigation due to their widespread occurrence in the environment and biota, coupled with their known or suspected impacts on human health. Recent studies have shown that a significant portion of poly- PFASs remain unidentified. This study presents a time-of-flight mass spectrometry approach based on continuously interleaving scans at low and high collision energies (ToF-MSE) for the rapid identification and characterization of unknown PFASs. The MSE mode allowed for the simultaneous acquisition of full-spectrum accurate mass data of both parent and fragment ions in a single chromatographic run. Specific to PFASs, the hypothesis that PFASs can be selectively detected by the ToFeMS(E) high-resolution parent-ion search (HRPIS) of their characteristic fragments was confirmed with certified standards of 24 poly- and per-PFAS. After being validated with these certified standards, the innovative HRPIS approach was applied to a group of commercial surfactants, which led to the identification of 47 new and 43 infrequently reported PFASs, including 40 non-ionic, 30 cationic, 15 zwitterionic, and five anionic compounds. It is envisaged that the results, especially the identification of new non-ionic PFASs, may provide important insights into the historical occupational and nonoccupational exposure to PFASs from the production and application of these surfactants. (C) 2017 Elsevier B.V. All rights reserved.
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