Study of PFAS Reactions with Ions in Different Conditions
Author Information
Author(s): Swift Stefan James, Omezzine Gnioua Maroua, Dryahina Kseniya, Španěl Patrik
Primary Institution: J Heyrovský Institute of Physical Chemistry of the CAS
Hypothesis
What are the reaction rates and product ions of PFAS with various reagent ions under dry and humid conditions?
Conclusion
Secondary reactions with water molecules remove positive product ions, making them unsuitable for SIFT-MS analysis of PFAS vapours, while negative product ions remain stable in humidity.
Supporting Evidence
- Rate coefficients were determined for 64 reactions involving PFAS.
- 55 positive and 71 negative product ions were identified.
- Humidity significantly affects the stability of positive product ions.
Takeaway
The study looks at how certain chemicals called PFAS react with different ions in the air, especially when it's humid. It found that some reactions change a lot with humidity, while others don't.
Methodology
The study used a dual polarity SIFT-MS instrument to analyze reactions of eight reagent ions with PFAS vapours at 393 K in both dry and humid conditions.
Limitations
The study did not aim to develop an analytical method characterized by a limit of detection due to the complexity of ion chemistry.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website