PFAS Analysis by ASTM D7979-20 for Water, Sludge, Influent, Effluent, and Wastewater
- Sample Matrix: water, sludge, influent, effluent, and wastewater samples
- Sample Preparation: filtration
- Detection Technique: LC-MS/MS
Standard Test Method for Determination of Per- and Polyfluoroalkyl Substances in Water, Sludge, Influent, Effluent, and Wastewater by Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
ASTM D7979-20 is used for the analysis of 21 PFAS in water, sludge, influent, effluent, and wastewater samples. It combines filtration sample preparation with LC-MS/MS analysis. D7979-20 is not available from Restek, but it may be purchased from ASTM. The full analyte list and products recommended by Restek are provided below. In addition, you can register and directly compare analyte lists and matrices across PFAS analysis methods here or visit www.restek.com/PFAS to explore our technical resources for PFAS analysis.
Analyte List for ASTM D7979-20 for PFAS Analysis
PFAS acronyms, compound names, and CAS numbers vary across methods and guidelines, and they also depend on compound form (e.g., neutral vs. salt). The following list uses standardized terminology to allow easy comparison across the methods and guidelines in our comprehensive guide. Please refer to ASTM D7979-20 for method-specific nomenclature.
| Acronym | Compound Name | CAS# |
| PFBS | Perfluoro-1-butanesulfonic acid | 375-73-5 |
| PFDA | Perfluorodecanoic acid | 335-76-2 |
| PFDoA | Perfluorododecanoic acid | 307-55-1 |
| PFHpA | Perfluoroheptanoic acid | 375-85-9 |
| PFHxS | Perfluoro-1-hexanesulfonic acid | 355-46-4 |
| PFHxA | Perfluorohexanoic acid | 307-24-4 |
| PFNA | Perfluorononanoic acid | 375-95-1 |
| PFOS | Perfluorooctanesulfonic acid | 1763-23-1 |
| PFOA | Perfluorooctanoic acid | 335-67-1 |
| PFTeDA | Perfluorotetradecanoic acid | 376-06-7 |
| PFTrDA | Perfluorotridecanoic acid | 72629-94-8 |
| PFUnA | Perfluoroundecanoic acid | 2058-94-8 |
| PFBA | Perfluorobutanoic acid | 375-22-4 |
| PFPeA | Perfluoropentanoic acid | 2706-90-3 |
| 8:2 FTUCA, FOUEA | 2H-perfluoro-2-decenoic acid | 70887-84-2 |
| PFecHS | Decafluoro-4-(pentafluoroethyl)cyclohexanesulfonate | 646-83-3 (67584-42-3) |
| 6:2FTCA, 6:2 FHEA | 2-perfluorohexyl ethanoic acid | 53826-12-3 |
| 8:2 FOEA | 2-perfluorooctyl ethanoic acid | 27854-31-5 |
| 10:2 FDEA | 2-perfluorodecyl ethanoic acid | 53826-13-4 |
| 6:2 FHUEA | 2H-perfluoro-2-octenoic acid | 70887-88-6 |
| 7:3 FTCA, FHpPA | 7:3 Fluorotelomer carboxylic acid or 3-perfluoroheptyl propanoic acid | 812-70-4 |
Recommended Products for ASTM D7979-20 for PFAS Analysis
ANALYSIS
Analytical LC Columns:
- Raptor C18 SPP column: 2.7 μm, 50 x 2.1 mm (cat.# 9304A52)
- Force C18 FPP column: 1.8 μm, 50 x 2.1 mm (cat.# 9634252)
Delay Columns:
- PFAS delay column: 5 µm, 50 x 2.1 mm (cat.# 27854)
- PFAS delay column: 5 µm, 50 x 3.0 mm (cat.# 580959 [custom product])
Guard Columns:
- UltraShield UHPLC precolumn filter: 0.2 µm frit (cat.# 25809)
- EXP direct connect holder for EXP guard cartridges (cat.# 25808)
- Raptor C18 EXP guard column cartridge: 2.7 µm, 5 x 2.1 mm (cat.# 9304A0252)
SAMPLE HANDLING
Sample Prep
- 25 mm syringe filter: 0.22 µm, polypropylene (cat.# 28935)
GENERAL LAB SUPPLIES
- Polypropylene vials: 100-pk. (cat.# 23243)
- Polypropylene vials: 1000-pk. (cat.# 23246)
- Polyethylene vial caps: 100-pk. (cat.# 23244)
- Polyethylene vial caps: 1000-pk. (cat.# 23247)
- Centrifuge tubes: 50 mL, 50-pk. (cat.# 25846)
- Centrifuge tubes: 50 mL, 500-pk. (cat.# 28290)
- Norm-Ject plastic syringe: 10 mL Luer Lock tip (cat.# 22775)*
- Norm-Ject plastic syringe: 5 mL Luer Lock tip (cat.# 22774)*
* Note that ASTM methods refer to the use of a glass syringe. Norm-Ject plastic syringes are made from polypropylene/polyethylene and can be used as an alternative.
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