Low Peak Area or Height

•	If using an inlet in split mode, check the split ratio.

•	Check for leaks.

•	Check the inlet for contamination.

•	Check each column and verify that it was cut and installed properly at each end.

•	Verify that the column type is correct.

•	Perform column maintenance: Bake out contaminants, remove the contaminated length of column near the inlet, and reverse and bake out the column as needed.

•	Verify that the liner type is appropriate for the sample.

•	Verify that the detector flow settings are correct.

•	Check the supply gas purity.

•	Check all trap indicators and dates.

•	Verify that the method parameters are correct.

•	Check sample stability.

•	Check configured syringe size. Some syringe sizes are specified at half-capacity. If the maximum syringe volume is marked at half-height on the barrel, not at the top of the barrel, enter twice the labeled volume when configuring the syringe size.

If using an FID:

•	Verify that the correct jet is installed.

•	Check for a dirty jet.

If using a uECD:

•	Replace the fused silica indented mixing liner.

•	Replace and reinstall column.

•	Clean the makeup gas adapter.

If using an NPD:

•	Check the detector for contamination.

•	Replace ceramic insulators.

•	Replace the bead.

If using an FPD:

•	Verify correct column installation.

•	Check that the correct filter is installed and is clean.

•	Check the flow rates.

•	Check the makeup gas type.