Gas FID knowledge
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Slide #1 6890 GC Detectors - The Flame Ionization Detector Com parison ofG C D etectors M SD IRD PID FPD (S ) NPD (P) NPD (N) ECD FID TCD AED 10 10 10 10 10 grams -15 -12 -9 -6 -3 fg pg ng ug mg 1 ppt 1 ppb 1 ppm 0.1 % 100 % Sensitivity (SIM ) (SC AN ) ELCD (X) ELCD (SorN )
description
details about FID
Transcript of Gas FID knowledge
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization Detector - Main ComponentsIgniter
Teflon Insulator
Collector
Interconnect/Spring
Electrometer
Jet
Heater/Sensor Assembly
Detector Base Assembly
Column Adapter
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization Detector - Theory of Operation1. H2 - Air Flame2. Sample is burned in flame3. When burned produces charged Ions4. Ions attracted to collector5. Collector current converted to output via Electrometer
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6890 GC Detectors - The Flame Ionization DetectorFID EPC Flow Manifold
Detector Pneumatic Connection
Gas Connections to GC
FID Flow Measurement Tool
FID JetPlugged FID Jet
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6890 GC Detectors - The Flame Ionization DetectorComplete Detector Assembly
FID Collector Removal
FID Igniter Replacement
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6890 GC Detectors - The Flame Ionization Detector - JetsJet TypePart NumberJet Tip idCapillaryG1531-805600.29 mm0.011"High TempG1531-806200.47mm0.018"Jet TypePart NumberJet Tip idCapillary19244-805600.29mm0.011"Packed18710-201190.47mm0.018"PackedWide bore18789-800700.030"High Temp Capillary19244-806200.47mm0.018"Jets for Capillary-Optimized FID Jets for Adaptable FID
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization Detector6890 EPC Module Original Design New Detector Mini-fold
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization Detector
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6890 GC Detectors - The Flame Ionization DetectorFlame won't light Measure Flows Clean/Replace Jet (6850 Jet Test) Are column and fittings tight ? Is the tank pressure high enough ? Is the Detector ON ?
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6890 GC Detectors - The Flame Ionization DetectorNoisy BaselineTurn off Air/H2Replace Detector Board/ interconnect/Teflon InsulatorsElectronic/Mechanical ProblemStill NoisyCheck:Filters,Traps,GassesClean JetVerify Column maxContamination problemYesNo
- HP 6890 - Flame Ionization DetectorPlanned Maintenance- Replace Jet (per Customer)- Clean/Replace Collector- Inspect interconnect and spring- Inspect ignitor glo-plug - replace if necessary- Measure H2/Air/Makeup Flows- Turn off H2 and measure FID Leakage Current - < 2pA- Ignite FID - monitor background and noise
