Maxxam is proud to be a gold sponsor at SMART Remediation Toronto 2019. Join our speaker, Dr. Terry Obal, for his presentation on PFAS replacement compounds.
Dr. Terry Obal’s Abstract:
PFAS Replacement Compounds: “The Next Generation”
Industries in the United States have phased out production of PFOA and PFOS because of potential health risks to humans. As global production of PFOS and PFOA is eliminated, manufacturers have been and continue developing PFAS replacement technologies to reformulate or substitute longer chain PFAS (e.g. PFOS and PFOA) with shorter-chain perfluoroalkyl or polyfluorinated substances. These processes result in: fluorotelomer alcohols (FTOH); perfluorobutane sulfonyl fluoride (PBSF)-based derivatives (e.g., perfluorobutane sulfonate (PFBS) as a substitute for PFOS); and polyfluoroethers (e.g. GenX, ADONA and F53B used in the manufacture of fluoropolymers) among others.
While there is a substantial body of knowledge for managing risk from PFOS and PFOA, much less is known about replacement PFAS. Although published toxicological data is limited, studies are suggesting that some of the lower molecular weight PFAS replacement compounds may be more hazardous than their long-chain predecessors. Information on the type and extent of environmental contamination by replacement PFAS is also limited, as most are currently not reported as part of the routine suite of PFAS commonly analysed by commercial analytical laboratories.
Three key PFAS replacements currently being studied are commonly referred to as GenX, ADONA and F53B. PFAS rreplacement chemicals like these tend to have fewer carbon atoms in the chain, but have many similar physical and chemical properties as their predecessors PFOS and PFOA (e.g. they repel oil and water).
Because of an increased interest in PFAS replacement compounds and the potential for their regulation in some jurisdictions, Maxxam has validated methods for the determination of GenX, ADONA and F53B by isotope dilution liquid chromatography coupled with tandem mass spectrometry. This presentation will describe: the history and environmental impact of these compounds; required sample collection protocols; analytical performance considerations; and site remediation challenges.
Date(s) - 24/01/2019
7:30 am - 3:00 pm