Ultrashort-Chain PFAS Testing Laboratories
Ultrashort-chain PFAS — very small perfluorinated acids and sulfonates — behave differently on the chromatography used by routine PFAS methods, so they are usually absent from standard analyte lists and require a dedicated approach.
What does it measure?
- Named ultrashort-chain compounds such as trifluoroacetic acid and perfluoropropanoic acid
- Whether ultrashort species explain fluorine that targeted PFAS results do not account for
When is it used?
- Investigating a gap between total organic fluorine and targeted PFAS results
- Characterising discharge or process water from fluorochemical operations
- Research and monitoring programmes extending beyond regulated compound lists
Sample considerations
- Confirm the exact compound list before sampling; laboratory capability for ultrashort species varies widely.
- Retention and recovery are more difficult than for longer-chain PFAS, so laboratory-specific quality control should be reviewed with the report.
Laboratories with relevant capabilities
No directory profile currently documents this specific capability. Submit a request and we will look for laboratories that cover it.
Frequently asked questions
- Why aren't ultrashort-chain PFAS in my standard report?
- Routine methods have fixed analyte lists selected for the programmes they serve, and most exclude ultrashort species because the chemistry required to retain and measure them differs.
- Should I ask for ultrashort-chain analysis?
- It is worth asking when a fluorine screen is much higher than the sum of targeted PFAS, or when a site or process is associated with small fluorinated acids. For routine compliance monitoring, the named method usually governs.
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