50 Troubleshooting
3 Chromatographic Symptoms
NPD Solvent Quenching
If the baseline does not recover after a solvent peak, try the
following:
• Turn hydrogen off/on around the solvent peak.
• Use nitrogen as the makeup gas.
• Set the total column flow and makeup gas to less than
10 mL/min.
• Increase the air flow by 10 mL/min.
• Increase the detector temperature to 325 °C.
• Implement an Agilent Dean’s switch solvent vent solution.
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