Baseline Rise During Oven Temperature Program - Agilent Technologies 7890 Series Troubleshooting Manual

3
Chromatographic Symptoms

Baseline Rise During Oven Temperature Program

50
• Inspect the column for bleed.
• Check for leaks/oxygen in carrier gas supply. Oxygen can
damage bonded phase capillary columns.
• 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
• Consider the effect of column film thickness on bleed. Try
using a column with a thinner film.
• Check for leaks at the column fittings. (See
Leaks".)
• Prepare and use a column compensation profile.
Contamination or Carryover.)
"Checking for
Agilent 7890 Series Troubleshooting