Per- and polyfluoroalkyl substances research Open access

Updated Guidance for Communicating PFAS Identification Confidence with Ion Mobility Spectrometry

Jonathon Fleming, Anna K. Boatman, Emma L. Schymanski, Kaylie I. Kirkwood‐Donelson and 4 more

UNC Libraries | Aug 20, 2026

Abstract

Abstract

Over the past decade, global contamination from per- and polyfluoroalkyl substances (PFAS) has become apparent due to their detection in countless matrices worldwide, from consumer products to human blood to drinking water. As researchers implement nontargeted analyses (NTA) to more fully understand the PFAS present in the environment and human bodies, clear guidance is needed for consistent and objective reporting of the identified molecules. Confidence levels for small molecules analyzed and identified with high-resolution mass spectrometry (HRMS) have existed since 2014; however, unification of currently used levels and improved guidance for their application is needed due to inconsistencies in reporting and continuing innovations in analytical methods. Here, we (i) investigate current practices for confidence level reporting of PFAS identified with liquid chromatography (LC), gas chromatography (GC), and/or ion mobility spectrometry (IMS) coupled with HRMS and (ii) propose a simple, unified confidence level guidance that incorporates both PFAS-specific attributes and IMS collision cross section (CCS) values.

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Authors

Researchers on this paper

Jonathon Fleming

first | ORCID 0000-0003-2447-3139

Anna K. Boatman

middle | University of North Carolina at Chapel Hill | ORCID 0000-0003-2582-0622

Emma L. Schymanski

middle

Kaylie I. Kirkwood‐Donelson

middle | ORCID 0000-0003-3248-820X

David M. Reif

middle | ORCID 0000-0001-7815-6767

Erin S. Baker

middle | University of North Carolina at Chapel Hill

Julia E. Rager

middle | University of North Carolina at Chapel Hill | ORCID 0000-0002-2882-5042

Jessie R. Chappel

last | University of North Carolina at Chapel Hill | ORCID 0009-0005-1492-118X

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Citation

BibTeX

@article{Fleming2026Updated,
  title = {Updated Guidance for Communicating PFAS Identification Confidence with Ion Mobility Spectrometry},
  author = {Jonathon Fleming and Anna K. Boatman and Emma L. Schymanski and Kaylie I. Kirkwood‐Donelson and David M. Reif and Erin S. Baker and Julia E. Rager and Jessie R. Chappel},
  journal = {UNC Libraries},
  year = {2026},
  doi = {10.17615/svrf-vs35},
  url = {https://doi.org/10.17615/svrf-vs35}
}

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