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Please select a topic from this section below:
GC and GC/MS Columns
GC Chromatography Troubleshooting
GC Column Troubleshooting
GC Method Development and Transfer
Solid-Phase Extraction
Click a question below to see the answer:
How do I improve my peak shapes? Some or all of my peaks are not gaussian shaped, but have a long leading edge and a sharp, almost vertical tailing edge.
Why are some of my peaks tailing?
Why are all of my peaks missing?
How come my peaks are larger and eluting earlier than they used to?
Why are my peaks of interest showing up in blanks?
What is the best way to troubleshoot column bleed?
What is gas chromatography?
What are some possible cause of baseline instability and disturbances?
What are some possible causes to change in peak shape?
What kind of test can I use if a suspect injector or carrier gas contamination?
What are the best steps to identifying a problem with baseline noise or drifts?
What are some possible causes of excessive baseline noise?
What can I do when I have loss of resolution?
What should I do when I have split peaks?
Our lab routinely injects samples with an aqueous matrix, and we commonly have problems getting reproducible results. Can we improve this?
During a chromatographic run, standards and samples show widening peaks over time. Is this normal?
When should one replace either the septum or liner?
How do you clean the GC injection port liner?
Does analyte pyrolysis become a problem with increasing injector temp?
What prevention tools can we use to assist with the minimization of Endrin & DDT breakdown?
How does one effectively use a pressure control program vs. a temperature program?
How do you know that the volume injected in a split/splitless injection port will not overfill the reaction chamber of the injector liner?
What are problems with water injections on capillary column? How to minimize the them?
How can I know if my sample is causing damage to my capillary column?
How do I know when it’s time to change my gas purifiers?
How can you maximize system inertness and lower detection and quantification limits?
Why does there appear to be a greater loss of active analytes in the lower levels with GC trace analysis?
I've noticed an interesting phenomenon when running a diesel standard on my tandem PID/FID. The hydrocarbons that elute after C16 are starting to significantly decrease and also tail very badly. What causes this?
Our Method requires a five-point calibration curve. Because the EPA recommends a 30 meter, 0.25 mm I.D. capillary column with a 1.0 µm film, my chromatograms exhibit all of the symptoms of overload for the 120 and 160 ppm standards. What can I do?
Our lab routinely injects samples with an aqueous matrix, we commonly have problems getting reproducible results. How do we improve this?
How to choose right column for my GC analysis?
How to troubleshoot peak shape problems?
How do you chemically deactivate injection liners? How do I know when I have an activity problem in my inlet?
What is the best way to condition a capillary column?
How can we improve our 6890 GC’s detection limit with better consumables?
