Thermo Scientific Corona Veo, Руководство по эксплуатации

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8 • Troubleshooting
Charged Aerosol Detectors Corona Veo (RS) Operating Manual Page 231
8.5.4.5
Peak Area Precision
Symptom Possible Cause Remedial Action
Capillary problems Capillary connections
not installed properly or
not tight, dead volumes
in capillary connections
Properly install the capillary connections. Tighten the capillary
connections. Replace capillary.
Contamination or
carry-over Autosampler carry-over Refer to the
Autosampler Operating Manual
.
Contamination or carry-
over in the system Flush the system using an appropriate solvent.
Environmental
conditions Unstable and
decomposing sample Use new sample. Change the conditions. Cool the sample in the
autosampler if possible.
Unstable environmental
conditions Make sure that the temperature and air humidity are constant.
Use column thermostatting. Avoid draft.
Injection volume
variation Operating issues with
the autosampler Operating issues with the autosampler may include:
•
Air trapped in autosampler flow path
•
Autosampler draws air from vial
• Draw speed too high
•
Gas content of sample too high or saturated
•
Injector needle clogged or needle tip deformed
• Injection valve or other autosampler components leaking
•
Needle seat worn out
Refer to the Autosampler Operating Manual .
Pump problems Operating issues with
the pump Operating issues with the pump may include:
• Piston seals in pump leaking
• Air trapped in pump head
•
Baseline fluctuations
• Pump pulsation or flow fluctuations
•
Irreproducible gradient
Refer to the
Pump Operating Manual
.