PFAS Holding Times and Preservation

Matrix Method Containers, Preservation, & Holding Times
Drinking Water EPA 537, 537.1, or 533 2 x 250-mL polypropylene w/ Trizma (537, 537.1) or NH4Ac preservative (533). Ship at < 10°C. 14 days (28 days for 533) from collection to extraction. 28 days to analyze.
Non-potable water and low solids sediment and biosolids Modified Isotope Dilution 2 x 125-mL or 250-mL HDPE. No preservative. Ship at < 10°C. 28 days from collection to extraction. 30 days to analyze.
Solids Modified Isotope Dilution 6 oz. HDPE. No preservative. Ship at < 10°C. 28 days from collection to extraction. 30 days to analyze.

*Note that some regulatory authorities may have different requirements than what are listed here.