U.S. EPA Method 537 Solution/Mixtures
The U.S. Environmental Protection Agency first published Method 537 in 2009 for the determination of selected perfluorinated alkyl acids in drinking water by solid phase extraction and liquid chromatography/ tandem mass spectrometry (LC/MS/MS). This method was modified in November 2018 to include additional target analytes; specifically, HFPO-DA, 9CI-PF3ONS, 11CI-PF3OUdS, and NaDONA. In response to these changes, Wellington has updated our ready-to-use Analyte Primary Dilution Standard mixtures as well as the Surrogate Primary Dilution Standars to conform to the updated method.
Please note that the Analyte Primary Dilution Standard is still available in two forms for your convenience (both containing the additional target analytes):
EPA-537PDS-R1 contains all of the native PFAS analytes required by Method 537 with PFHxS, PFOS, N-MeFOSAA, and N-EtFOSAA, being present as linear/branched mixtures whereas EPA-537PDSL-R1 contains only linear isomers of the same components.
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