Dr. Kesavalu Bagawandoss, Ph.D., J.D.

PFAS in Air

Dr. Kesavalu Bagawandoss, Ph.D., J.D., Industries & Environment Technical Director, SGS North America, Inc.

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.  

Dr. Doss has more than 40 years’ experience in the analytical chemistry field. Dr. Doss’s expertise spans chemistry, environmental analysis, hydrocarbon chemistry (gas and liquids), forensics, industrial hygiene (managed an AIHA accredited lab for 10 years), Air analyses (TO compendium methods), Dioxins/Dibenzofurans, PCB Congeners, emerging contaminants – PFAS, 6-PPD, 6-PPDQ, microplastics, biota analyses, hazardous waste management, client services, management of laboratories, laboratory builds, data validation, data management, laboratory audits, litigation support and QA services.  Dr. Doss received his Juris Doctorate from Southern University Law Center with honors, where he was a Law Review Editor and is licensed to practice law in Louisiana, currently.  He earned his Ph.D., Engineering (Environmental Science) from the University of Oklahoma, Norman, OK.  M.S. in Chemistry from Wichita State University, Wichita, KS.  B.S. in Chemistry from Loyola College, University of Madras, India