If you notice extra peaks in your typical chromatograms; potential causes are listed below.
| Causes | Solutions |
| Other components in sample | - It is normal to see extra peaks if they are present in the sample. |
| Late eluting peaks from previous injection | - Increase run time or solvent strength; increase flow rate to increase the number of column volumes per unit time. |
| Ghost peaks | - Check purity of mobile phase; use ghost traps (if applicable). |
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