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.pdf

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1、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-con

2、taining 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(Dri

3、nking water)US EPA Method 533(Drinking water)2021 202340 compounds:8 PFSAs11 PFCAs6 ethers13 Precursors2 Cl-PFASDrafts US 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 1633ExtractionCleanu

4、pEvaporationDried Biosolid Spike isotopically labeled PFASExtract with methanolic ammonium hydroxideSupernatant ENVI-CarbCleanupElute with MeOHEvaporationMix with H2OMix with H2O4Ozelcaglayan et al.,2023,Environ.Sci:Water Res.Technol.Ozelcaglayan et al.,2024,ACS ES&T WaterDried Biosolid Spike isotop

5、ically labeled PFASExtract with methanolic ammonium hydroxideSupernatant ENVI-CarbPSAC18ExtractionCleanupEvaporationMix with H2OPFAS in Biosolids Analytical Workflow LC-MS/MSFiltration(0.2-m alumina membrane)6Adsorbents used in the cleanup stepType of organics that can be removedGraphitized non-poro

6、us carbon(ENVI-Carb)Planar,non-polar compoundsC18-functionalized silica(C18)Non-polar compoundsPrimary-secondary amine-functionalized silica(PSA)Hydrophilic compounds:fatty acids,sugar,pigmentsHydrophilic-lipophilic balance(HLB)resinAnionic&neutral compoundsWeak anion exchange resin(WAX)Anionic comp