TOP assay (PFAS precursors)
Total oxidizable precursor (TOP) assay can be used when estimating the presence of PFAS precursors and intermediates by oxidizing them into stable end-products. The analysis can be combined with traditional PFAS analysis methods to obtain additional information.
The following are examples of compounds that can be analyzed:
Abbreviation | Compound | CAS number |
---|---|---|
PFBA | perfluorobutanoic acid | 375-22-4 |
PFPeA | perfluoropentanoic acid | 2706-90-3 |
PFHxA | perfluorohexanoic acid | 307-24-4 |
PFHpA | perfluoroheptanoic acid | 375-85-9 |
PFOA | perfluorooctanoic acid | 335-67-1 |
PFNA | perfluorononanoic acid | 375-95-1 |
PFDA | perfluorodecanoic acid | 335-76-2 |
PFUnA; PFUdA | perfluoroundecanoic acid | 2058-94-8 |
PFDoA | perfluorododecanoic acid | 307-55-1 |
PFTrDA; PFTriA | perfluorotridecanoic acid | 72629-94-8 |
PFTeA | perfluorotetradecanoic acid | 376-06-7 |
PFHxDA | perfluorohexadecanoic acid | 67905-19-5 |
PFODA | perfluorooctadecanoic acid | 16517-11-6 |
PFBS | perfluorobutanesulfonic acid | 375-73-5 |
PFPeS | perfluoropentanesulfonic acid | 2706-91-4 |
PFHxS | perfluorohexanesulfonic acid | 355-46-4 |
PFHpS | perfluoroheptanesulfonic acid | 375-92-8 |
PFOS | perfluorooctanesulfonic acid | 1763-23-1 |
PFNS | Perfluorononanesulfonic acid | 68259-12-1 |
PFDS | perfluorodecanesulfonic acid | 335-77-3 |
PFUnDS | perfluoroundecanesulfonic acid | 749786-16-1 |
PFDoS | perfluorododecanesulfonic acid | 79780-39-5 |
HFPO-DA (Gen X) | 2,3,3,3-Tetrafluoro-2-(heptafluoropropoxy)propanoic acid | 13252-13-6 |
HFPO-TA | perfluoro-2,5-dimethyl-3,6-dioxanonanoic acid | 13252-14-7 |
DONA; ADONA | 4,8-dioxa-3H-perfluorononanoic acid | 919005-14-4 |
PFMOPrA | perfluoro-3-methoxypropanoic acid | 377-73-1 |
NFDHA | perfluoro-3,6-dioxaheptanoic acid | 151772-58-6 |
PFMOBA | perfluoro-4-methoxybutanoic acid | 863090-89-5 |
PFecHS | cyclohexanesulfonic acid, 1,2,2,3,3,4,5,5,6,6-decafluoro-4-(1,1,2,2,2-pentafluoroethyl)-, potassium salt (1:1) | 335-24-0 |
3:3 FTCA | 2H,2H,3H,3H-perfluorohexanoic acid | 356-02-5 |
5:3 FTCA | 2H,2H,3H,3H-perfluorooctanoic acid | 914637-49-3 |
7:3 FTCA | 2H,2H,3H,3H-perfluorodecanoic acid | 812-70-4 |
PFEESA | perfluoro(2-ethoxyethane)sulfonic acid | 113507-82-7 |
6:2 Cl-PFESA; 9Cl-PF3ONS | 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid | 756426-58-1 |
8:2 Cl-PFESA; 11Cl-PF3OUdS | 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid | 763051-92-9 |
4:2 FTSA; 4:2 FTS | 4:2 fluorotelomer sulfonic acid | 757124-72-4 |
6:2 FTSA; 6:2 FTS | 6:2 fluorotelomer sulfonic acid | 27619-97-2 |
8:2 FTSA; 8:2 FTS | 8:2 fluorotelomer sulfonic acid | 39108-34-4 |
FBSA | perfluorobutane sulfonamide | 30334-69-1 |
FHxSA | perfluorohexanesulfonamide | 41997-13-1 |
FOSA | perfluorooctanesulfonamide | 754-91-6 |
MeFOSA; N-MeFOSA | n-methylperfluorooctanesulfonamide | 31506-32-8 |
EtFOSA; N-EtFOSA | n-ethylperfluorooctanesulfonamide | 4151-50-2 |
MeFOSE | n-methylperfluorooctanesulfonamidoethanol | 24448-09-7 |
EtFOSE | n-ethylperfluorooctanesulfonamidoethanol | 1691-99-2 |
NMeFOSAA; MeFOSAA | n-methylperfluorooctanesulfonamidoacetic acid | 2355-31-9 |
NEtFOSAA; EtFOSAA | n-ethylperfluorooctanesulfonamidoacetic acid | 2991-50-6 |
FOSAA | perfluorooctane sulfonamidoacetic acid | 2806-24-8 |
10:2 FTS | 10:2 Fluorotelomer sulfonic acid | 108026-35-3 |
The analysis is suitable for different matrices, such as water and fire-fighting foams.
Contact us for more information and a quote for analyzing your samples.
- Required sample quantity
- 2 x 250 ml of water/liquid or 50 g of solid material in HDPE containers
- Detection limit
- The reporting limit/LOQ depends on the sample matrix (1–10 ng/L; 1–100 µg/kg)
- Available quality systems
- Accredited testing laboratory
- Device types
- Method expert
Price
We also charge a 97 € service fee per order.
Large batches of samples are eligible for discounts.
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