| Cause Category | Frequency (n=147) | Typical Pressure Reading | MO2 Valve State | |----------------|------------------|--------------------------|------------------| | Septum/seal misalignment | 70 (48%) | 0–5 psi (expected: 120 psi) | Stalled open | | Mobile phase B flow inconsistency | 47 (32%) | Fluctuating 80–160 psi | Cycling | | RFID cartridge read failure | 29 (20%) | Normal (118–122 psi) | N/A (abort before run) | | Other (cracked vial, firmware) | 1 (0.7%) | 200+ psi | Closed |
[Generated for Academic Purposes] Journal: Journal of Analytical Method Troubleshooting , Vol. 18, Issue 2 Date: April 19, 2026
60% of failures occurred between runs 15–30 of a batch, suggesting thermal or cumulative mechanical stress. No correlation was found with ambient humidity (p > 0.05).
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