Presentation Profile
PFAS in Air OTM Methods
Currently Scheduled: 10/15/2025 - 9:00 AM - 9:30 AM
Room: Tulip
Main Author
Kesavalu Bagawandoss - SGS North America, Inc.
Abstract:
PFAS in air is a burning topic in the “Forever Chemicals World”. Although OTM-45 method has been in use for a while that method is an impinger sample collection method in a liquid and analyzed by EPA method 1633 or 537 (mod.). OTM -50 is an Air method, wherein, samples are collected in SUMMA canisters akin to TO-15A. OTM-50 names a target compound list of 30 PFAS compounds. The differences between regular PFAS LC/MS/MS OTM-45 and OTM-50 methods will be discussed. US EPA requires that 30 PFAS compounds be analyzed as provided in the OTM-50 method. The analytical standards, surrogates and internal standards will be outlined for the OTM -50 method. Unlike regular PFAS standards the sources from which standards are acquired are quite different. Method OTM-50 and its process on sample collection and analysis will be outlined. Data from OTM-50 method will be discussed.
