Per- and Polyfluorinated Alkyl Substances (PFAS)
Polyfluorinated Alkyl Substances (PFAS) chemical compounds are a class of emerging contaminants that are generating high levels of interest and concern in the environmental community and the public at large. These compounds have a wide range of industrial uses and commercial product applications and are present in many consumer products as well. A short list of general product categories would include industrial polymers, stain repellents, waterproofing products, surfactants, and packaging as well as aqueous film forming foams (AFFF) used for firefighting. The primary sources of PFAS releases into the environment are industrial facilities where they were used or contained in raw material feedstocks and sites where AFFF was used for training purposes or actual firefighting. Other potentially significant sources are landfills and wastewater treatment plants. PFAS compounds are highly soluble in water, chemically stable and persistent. Practitioners are cautioned to carefully consider potential sources of PFAS cross-contamination in the design of their sampling programs and sampling SOPs. There is considerable information available on line from regulators and academia that can provide recommendations to minimize these potential sources of cross-contamination, ranging from clothing and personal care products to sampling equipment. For more information regarding recommended sampling techniques, please download Alpha Analytical’s PFAS Sampling Instructions.
Alpha Analytical utilizes solid phase extraction (SPE) with liquid chromatography and tandem mass spectrometry (LC/MS/MS) protocols for PFAS analysis of aqueous samples. Depending on the project application, PFAS target compound list and regulatory requirements, Alpha will either run EPA Method 537 Rev 1.15 (incorporating the EPA Technical Advisory 815-B-16-021) or a proprietary LC/MS/MS isotope dilution technique. In either case, both branched and linear PFAS isomers are properly quantified during analysis. Up to 24 PFAS compounds can be reported with a reporting limit of 2 ng/L.
Alpha Analytical holds both DOD ELAP and NELAC certification for both Method 537 as well as our proprietary LC/MS/MS isotope dilution method.