PFAS in Air - Method OTM-50

Air Monitoring, Methods, and Technology
Oral Presentation

Prepared by K. Bagawandoss
SGS North America, Inc., 10175 Harwin Drive, Suite 107, Houston, Texas, 77036, United States


Contact Information: [email protected]; 281-881-1457

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.