EPA has released a newly developed and validated analytical methodology for testing pesticide products for the presence of per- and polyfluoroalkyl substances (PFAS). Referred to as the ACB Method, this new PFAS-detection method was developed by EPA’s Analytical Chemistry Branch (ACB). The ACB Method primarily differs from an alternative PFAS-detection method (the Lasee Method) in its approach to sample preparation. As background, the Lasee Method was introduced by Steven Lasee in November 2022 in his co-authored study titled “Targeted Analysis and Total Oxidizable Precursor assay of several insecticides for PFAS” in the Journal of Hazardous Materials. Read more