Screening of Adsorbable Per‐ and Polyfluoroalkyl Substances in Aqueous Environments Using Pyrolysis–GC–MS

ABSTRACT This rapid communication presents a novel solvent‐free pyrolysis–gas chromatography–mass spectrometry combined with an adsorbent‐assisted adsorption–recovery for detecting per‐ and polyfluoroalkyl substances (PFAS) in aqueous environments. The approach offers an environmentally friendly alternative to conventional extraction techniques that rely on organic solvents. A PFAS‐free polymer–based adsorbent was selected based on its high recovery efficiency. Method validation was performed using 500 mL of a 50 ng/L PFAS standard solution, to which 10 mg of the adsorbent was added and stirred. The PFAS‐loaded adsorbent was then introduced into the pyrolysis–gas chromatography–mass spectrometry system, enabling successful detection of surface‐adsorbed PFAS with sufficient signal‐to‐noise ratios. Following validation, the method was applied to actual tap and spring water samples. Due to the absence of detectable PFAS in field samples, PFAS‐positive simulants were prepared using spiked water matrices. Pyrolysis–gas chromatography–mass spectrometry analysis confirmed reliable detection at 50 ng/L, aligning with local regulatory thresholds. This approach integrates a simple, solvent‐free sample preparation procedure with pyrolysis–gas chromatography–mass spectrometry, offering a rapid and environmentally compatible method for PFAS screening. Its operational simplicity and regulatory‐level sensitivity underscore its potential for routine environmental monitoring.