Transcription of Agilent GC troubleshooting guide poster
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Agilent GC troubleshooting guide poster
= inR = = inPeak widthAll Peaks Some Peaks SymmetricalFrontingOverloadClean Blank Run(no injection)Ghost CauseSolutionCommentsContaminants introduced with sampleSample or solvent cleanupContaminants in sample process or solventInlet contaminationClean the injector, replace liner, gold seal, and septumTry a condensation test; gas lines may also need cleaning. Take steps to prevent sample backflush (reduce injection volume, lower inlet temperature, use larger volume liner)Septum bleedReplace septumUse a high-quality septum appropriate for the inlet temperatureContamination of sample before introduction to the GCCheck sample handling steps for potential contamination sources: sample cleanup, handling, transfer, and storageUsually occurs after changing a gas cylinderSemivolatile contamination (peak widths will be broader than sample peaks with similar retention)Bake-out column.
the syringe needle. Use an auto injector Mixed sample solvent Change sample solvent to a single solvent Worse for solvents with large differences in polarity or boiling ... filters Usually occurs after changing a gas cylinder Column inserted too far into the detector Reinstall the column Consult GC manual for proper
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