Chromatographic Symptoms 3
Troubleshooting 27
Baseline Rise During Oven Temperature Program
• 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.
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