Agilent Technologies 7890A Troubleshooting Manual page 32

3
Chromatographic Symptoms
Baseline Rise During Oven Temperature Program
32
• Inspect the column for bleed.
• Check for leaks/oxygen in carrier gas supply.
• Check gas supply oxygen trap indicator or date.
• Make solvent blank runs to evaluate baseline without
sample.
• Make "no injection" blank runs (remove the syringe from
the injector and start a run) to evaluate baseline without
solvent.
• Check for contamination. (See Contamination or
Carryover.)
• Consider the effect of column film thickness on bleed.
• Check for leaks at the column fittings. (See "Checking for
Leaks".)
• Prepare and use a column compensation profile.
Troubleshooting