Elevated levels of PFAS widely detected in consumer products, building materials, indoor air, and house dust underscore the relevance of the indoor environment to human exposure. Another source of PFAS in the indoor environment is through vapor intrusion from PFAS contaminated subsurface vapor sources. Reliable experimental measurements for emissions of PFAS into the indoor environment are critical for understanding how PFAS move through the environment to impact people and ecosystems. Whereas there have been a few PFAS methods developed for water, soils, sediments, biosolids, biota, and outdoor air, there are currently no similar efforts for vapor-phase PFAS in indoor air. FTOHs are volatile precursors to perfluorinated carboxylic acids and other PFAS. They are widely detected in air. This ASTM standard will describe a TD-GC/MS/MS method to determine FTOHs in air. The standard can be used for measuring emissions of FTOHs to indoor air and associated environments. The method may be applicable to ambient air.
The title and scope are in draft form and are under development within this ASTM Committee.