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This research examines the effects of evaporative loss on the recovery of perfluoroalkyl sulfonamides during PFAS analysis.

February 28, 2026ACS OmegaOpen Access

Evaporative Losses of Perfluoroalkyl Sulfonamides during PFAS Analysis

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This research examines the effects of evaporative loss on the recovery of perfluoroalkyl sulfonamides during PFAS analysis.
Measured recovery of three perfluoroalkyl sulfonamides (FASAs) in environmental conditions.
Employed nitrogen blowdown method after solid-phase extraction of samples.
Assessed the impact of adding sodium hydroxide (NaOH) during the blowdown process.
Recoveries of FASAs decreased to less than 1% at 2 μg/L concentration during nitrogen blowdown.
Adding 10 mM NaOH improved recoveries to over 80% for all FASAs.
NaOH addition led to a 40% increase in concentrations of precursors detected in diluted AFFF.

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Findings reveal significant analytical bias in measuring PFAS in environmental samples, indicating the need for improved methodologies.

Dixit et al. (2026) studied this question.

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