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 mostly aqueous sediment and biosolids | UPLC-MS/MS 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 | UPLC-MS/MS 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.