PFAS Analysis by ASTM D7968-23 for Soil
- Sample Matrix: soil
- Sample Preparation: solvent extraction and filtration
- Detection Technique: LC-MS/MS
Standard Test Method for Determination of Polyfluorinated Compounds in Soil by Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
ASTM D7968-23 is used for the analysis of 21 PFAS in soil. It combines solvent extraction and filtration sample preparation with LC-MS/MS analysis. ASTM D7968-23 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 D7968-23 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 D7968-23 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 D7968-23 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)
- Q-sep multispeed centrifuge for QuEChERS (cat.# 28295)
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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