Agilent Technologies 7250 Troubleshooting And Maintenance Manual page 32

2 General Troubleshooting
Baseline wanders
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Retention times for all peaks drift – shorter
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Retention times for all peaks drift – longer
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Poor sensitivity
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32
Insufficient carrier gas supply pressure*
Malfunctioning flow or pressure regulator*
Intermittent leak in the GC inlet*
* This could cause a fault condition in the GC that would prevent the GC
from operating.
Column has been shortened
Initial oven temperature was increased
Column is getting old
Column flow has been reduced
Initial oven temperature was decreased
Active sites in the sample path
Leaks in the GC inlet*
* This could cause a fault condition in the GC that would prevent the GC
from operating.
Incorrect tuning, or tune file that does not match the type of analysis
Repeller voltage is too low
Incorrect temperatures (oven, GC/MS interface, ion source, or mass filter)
Incorrect sample concentration
Leaking GC inlet*
Dirty GC inlet
Incorrect split ratio
Purge-off time in splitless mode is too short
7250 Accurate-Mass Q-TOF Troubleshooting and Maintenance Manual