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FID Routine Maintenance
Item Comments
FID Jet A plugged jet results in longer retention
times as the column exit/detector pressure
increases. Once the jet becomes completely
plugged, it is difficult to light or sustain
a flame.
Igniter Glow-Plug Replace if corroded or burned out.
FID Collector/Insulators Contamination can contribute to detector
noise or loss of sensitivity.
Column Adapter/Seals
For Adaptable FID only
Leaks at column fittings can result in difficulty
lighting the FID or sustaining a flame
after injection.
The FID requires routine maintenance to ensure optimum performance. Maintenance
requirements are application dependent, but Agilent recommends periodically cleaning
or replacing the following items:
Typical FID Problems
Condensation
Since the FID combustion process results in water formation, the detector temperature
must be kept above 300°C to prevent condensation. At detector block temperatures
below 300°C, the castle assembly drops below 100°C, resulting in condensation
and possible rusting. Such condensation, especially when combined with chlorinated
or fluorinated solvents or samples, causes corrosion, with resulting increase in detector
noise and loss of sensitivity.
Flame Ionization Detector (FID)
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