PFAS分析挑战和机遇当前的分析方法如何影响我们调查PFAS发生和命运的能力

How Current Analytical Methodologies Affect Our Ability to Investigate the Occurrence and Fate of PFAS Anh Pham Department of Civil & Environmental EngineeringUniversity of WaterlooPFOS & PFOA1995-2000--2007LC/MS/MS Mid 90sPTFE-containing products1940sPFAS-containing firefighting foams (AFFF)1970sPFOS-containing products1950s1PFAS –“Emerging” ContaminantsTOF by CICPFAS Analysis: The New Wild West201914 compounds:3 PFSAs9 PFCAs2 Precursors200918 compounds:3 PFSAs9 PFCAs2 Precursors4 ethers201825 compounds:4 PFSAs9 PFCAs6 ethers3 Precursors2 Cl-PFASUS EPA Method 537.1 (Drinking water) US EPA Method 537(Drinking water) US EPA Method 533(Drinking water) 2021 –202340 compounds:8 PFSAs11 PFCAs6 ethers13 Precursors2 Cl-PFASDraftsUS EPA Method 1633(All matrices) 2024US EPA Method 1633(All matrices)PFAS analytical methods are still evolving3WAXAnalysis of PFAS in Biosolids by US EPA Method 1633ExtractionCleanupEvaporationDried Biosolid Spike isotopically labeled PFASExtract with methanolic ammo