Discover how frequency modulation spectroscopy (FMS) is transforming container closure integrity testing. Citing USP <1207>, which emphasizes laser-based headspace analysis for detecting even the smallest leaks, the research presents a theoretical framework for predicting gas ingress through tiny vial defects. These predictions were validated by measuring changes in oxygen levels and pressure, confirming FMS as a highly sensitive method.

By accurately detecting micron-scale leaks, non-destructive headspace analysis can help ensure package integrity. The study also highlights the complexity of linking leak rates to defect sizes. A must-read for packaging validation engineers.