- High baseline noise in 2414
- Sample and reference flow cell thoroughly purged
- Temperature set on the column and on the detector
- Very low pump pressure ripple
- 2414 RID
- 2695 Pump
The mobile phase is mixed by the 2695 pump, generating slight turbulence that you can see in the 2414 chromatogram baseline.
FIX or WORKAROUND
Pre-mix the mobile phase in a bottle.
baseline ripple, eluent, pressure fluctuation