Troubleshooting 3-19
Baseline drift, slow Solvent contaminated Use fresh solvents.
Decreased UV lamp
energy
Check lamp energy
(detector
documentation).
Ambient temperature
fluctuations
Stabilize operating
environment
temperature enough to
allow full equilibration.
UV detector flow cell
leaking (internal,
cross-port)
Check flow cell; tighten
connections.
Dirty flow cell Clean flow cell
(detector
documentation).
Baseline noise,
short-term (30 sec to 1
min) cycling
Inadequate solvent
blending in pump
Connect high flow
mixer.
Flow fluctuating Stabilize flow.
Solvent not mixed
(short or long term
cycling)
Stir solvent.
AC power source (short
or long term cycling)
Disconnect other
instruments on the
power line; try a
different wall outlet;
have line voltage
checked; use power
conditioner.
Radio frequency noise
(short or long term
cycling)
Eliminate interference.
Chromatography troubleshooting (Continued)
Symptom Possible cause Corrective action
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