Characterization of Amidine‐Based Degradation Products of Novichok A‐Series Nerve Agents Using Single‐Quadrupole GC–MS

This work establishes comprehensive GC-MS reference data for amidine-based degradation products associated with Novichok A-series nerve agents. The developed method enabled the successful identification of spiked amidine compounds in the 56th and 57th OPCW proficiency test (PT) samples. These results will enhance the capability of forensic and verification laboratories to detect, confirm, and interpret degradation markers, thereby supporting OPCW PT, chemical weapons attribution, and compliance with the CWC.