Baseline Wanders; Retention Times For All Peaks Drift - Shorter; Retention Times For All Peaks Drift - Longer - HP 5973 Hardware Manual

Baseline wanders

• Insufficient carrier gas supply pressure*
• Malfunctioning flow or pressure regulator*
• Intermittent leak in the injection port*
* These could cause a fault condition in the GC that would prevent the GC from
operating.
Retention times for all peaks drift – shorter
• Column has been shortened
• Initial oven temperature was increased
• Column is getting old
Retention times for all peaks drift – longer
• Column flow has been reduced
• Initial oven temperature was decreased
• Active sites in the sample path
• Leaks in the injection port*
* This could cause a fault condition in the GC that would prevent the GC from
operating.
Troubleshooting the MSD
3
Chromatographic symptoms
73