Abstract
Bioaccumulation of PFAS in aquatic organisms is an environmental problem of growing concern around the world. This problem has been tackled by regulatory bodies by proposing EQS for biota in EU water bodies and tolerable daily intake for food. The introduction of regulatory limits requires the availability of harmonised and validated analytical methods of sufficient sensitivity. This paper reviews recent advances in analytical methods for analysis of PFAS in aquatic organisms. The methods available for biota analysis are mostly based on three extraction procedures: ion-pair extraction, solvent liquid extraction, and alkaline digestion. The resulting extracts are then subjected to different clean-up or enrichment steps on solid adsorbents, for example graphitized carbon black, C18, and WAX phases. All methods reviewed in this work give reliable results but are partially validated only, because of the lack of certified reference materials and regular interlaboratory exercises. The few interlaboratory exercises performed on real unspiked samples did not afford satisfactory results for PFAS other than PFOS, especially for matrices with high lipid content, for example mussels. The reasons for those partially negative results have been identified, and can mainly be attributed to calibration procedures and availability and purity of standards. The urgent need for certified reference materials for this type of analysis is emphasized.
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Abbreviations
- 6–2 FTUCA:
-
2H-Perfluoro-2-octenoic acid
- 7–1 FTOH:
-
Pentadecafluoro-1-octanol
- 7–3 FTCA:
-
2H,2H,3H,3H-Pentadecafluorodecanoic acid
- 7–3 FTUCA:
-
2H,3H-Pentadecafluoro-2-decenoic acid
- 8–2 FTCA:
-
2H,2H-Heptadecafluorodecanoic acid
- 8–2 FTUCA:
-
2H-Hexadecafluoro-2-decenoic acid
- 10–1 FTOH:
-
1H,1H-Perfluoro-1-undecanol
- 10–2 FTCA:
-
2H,2H-Nonadecafluorododecanoic acid
- 10–2 FTUCA:
-
2H-Octadecafluoro-2-dodecenoic acid
- 7H-PFHpA:
-
7H-Perfluoroheptanoic acid
- BPTA:
-
3,5-Bis(trifluoromethyl)phenylacetic acid
- CRM:
-
Certified reference material
- dw:
-
Dry weight
- EPI:
-
Enhanced product ion
- EQS:
-
Environmental quality standard
- ESI:
-
Electrospray ionization
- FTCA:
-
Fluorotelomer carboxylate
- FTOH:
-
Fluorotelomer alcohols
- FTUCA:
-
Fluorotelomer unsaturated carboxylate
- GC-PCI-MS:
-
Gas chromatography–positive chemical ionization mass spectrometry
- IDA:
-
Information-dependent acquisition mode
- i,p-PFNA:
-
Perfluoro-7-methyloctanoic acid
- IPE:
-
Ion-pair extraction
- IS:
-
Internal standard
- IT:
-
Ion trap
- LOD:
-
Limit of detection
- LOQ:
-
Limit of quantification
- MSPD:
-
Matrix solid-phase dispersion
- MTBE:
-
Methyl tert-butyl ether
- N-ethyl FOSA:
-
N-Ethylperfluorooctanesulfonamide
- N-ethyl FOSE:
-
N-Ethylperfluorooctanesulfonamidoethanol
- N-ethyl PFOSA:
-
N-Ethylperfluorooctanesulfonamide
- N-methyl FOSA:
-
N-Methylperfluorooctanesulfonamide
- N-methyl FOSE:
-
N-Methylperfluorooctanesulfonamidoethanol
- N,N-diethyl PFOSA:
-
N,N-Diethylperfluorooctanesulfonamide
- PFAS:
-
Perfluoroalkyl substances
- PFBA:
-
Perfluorobutanoic acid
- PFBS:
-
Perfluorobutanesulfonate
- PFCA:
-
Perfluorocarboxylic acids
- PFDA:
-
Perfluorodecanoic acid
- PFDoDA:
-
Perfluorododecanoic acid
- PFDPA:
-
Perfluorodecylphosphonic acid
- PFDS:
-
Perfluorodecanesulfonate
- PFHxA:
-
Perfluorohexanoic acid
- PFHxDA:
-
Perfluorohexadecanoic acid
- PFHxPA:
-
Perfluorohexylphosphonic acid
- PFHxS:
-
Perfluorohexanesulfonic acid
- PFHpA:
-
Perfluoroheptanoic acid
- PFNA:
-
Perfluorononanoic acid
- PFOA:
-
Perfluorooctanoic acid
- PFOcDA:
-
Perfluorooctadecanoic acid
- PFOPA:
-
Perfluorooctylphosphonic acid
- PFOS:
-
Perfluorooctanesulfonic acid
- PFOSA:
-
Perfluorooctanesulfonamide
- PFOSi:
-
Pefluorooctanesulfinate
- PFPA:
-
Perfluorinated phosphonic acids
- PFPeA:
-
Perfluoropentanoic acid
- PFSA:
-
Perfluorosulfonic acids
- PFTeDA:
-
Perfluorotetradecanoic acid
- PFUnDA:
-
Perfluoroundecanoic acid
- PLE:
-
Pressurized liquid extraction
- QqLIT:
-
Triple-quadrupole with linear trap
- QqQ:
-
Triple quadrupole
- QTOF:
-
Quadrupole time-of-flight
- QuEChERS:
-
Quick easy, cheap, rugged and safe
- RSD:
-
Relative standard deviation
- SLE:
-
Solid–liquid extraction
- SPE:
-
Solid phase extraction
- SRM:
-
Selected reaction monitoring
- TBA:
-
Tetrabutylammonium hydrogen sulfate
- THF:
-
Tetrahydrofuran
- THPFOS:
-
1H,1H,2H,2H-Perfluorooctanesulfonic acid
- TOF:
-
Time-of-flight
- UE:
-
Ultrasonic extraction
- WAX:
-
Weak anion exchange
- ww:
-
Wet weight
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Acknowledgments
The authors acknowledge the fundamental contribution of anonymous referees to improvement of this paper. They also warmly thank Claudia Martins (Thermo Fisher) for her valuable comments and suggestions during the revision process.
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Published in the topical collection Emerging Contaminants in Biota with guest editors Yolanda Picó and Damià Barceló.
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Valsecchi, S., Rusconi, M. & Polesello, S. Determination of perfluorinated compounds in aquatic organisms: a review. Anal Bioanal Chem 405, 143–157 (2013). https://doi.org/10.1007/s00216-012-6492-7
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DOI: https://doi.org/10.1007/s00216-012-6492-7