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Use of ASTM 7968 to measure PFAS in soils at three sites
Citation:
Acheson, C., L. Zintek, D. Kleinmaier, M. Mills, R. Herrmann, J. Goetz, S. Halstead, S. Bonina, B. Shrestha, A. Burkes, AND R. Venkatapathy. Use of ASTM 7968 to measure PFAS in soils at three sites. REMTEC, NA, N/A, March 09 - 11, 2021.
Impact/Purpose:
ASTM D7968 was used to measure PFAS concentrations in soils at three sites: Joint Base Elmendorf Richardson (JBER); DFSP Melville (DFSPM); and a research study evaluating land application. The accuracy and precision of the method will be summarized based on data quality measurements.
Description:
ASTM D7968 was used to measure PFAS concentrations in soils at three sites: Joint Base Elmendorf Richardson (JBER); DFSP Melville (DFSPM); and a research study evaluating land application. Concentrations and PFAS observed varied at the three sites. For example, PFOS ranged from 116 to 7.6 x 106 ng/kg at JBER, 30 to 340 ng/kg at DFSPM, and 6.2 x 103 to 2.7 x 104 at the research site. When using this method, a 2-g sample is placed in a polyethylene vial, spiked with isotopically labeled surrogates, and tumbled for 1 hr in 10-mL of 50/50 methanol water mixture adjusted to pH 9-10 with ammonium hydroxide. The samples are centrifuged, and the extract is filtered. After adding acetic acid to adjust to pH to 3-4, the extract is analyzed by liquid chromatography with tandem mass spectrometry. The accuracy and precision of the method will be summarized based on data quality measurements.