Slight upward trend in baseline vs slight downward trend

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Greetings,
I am relative new to ion chromatography and have a number of instruments I am responsible for. I am seeing a slight downward trend in my baseline on one instrument and a slight upward trend on a different instrument. They have been equilibration for a few hours and I am not sure what is the cause. I am running anion analysis with a carbonate/bicarbonate eluent and dilute sulfuric acid regen.

Any thoughts welcome
Please specify the drift in µS/h.
Slight drift may be seen due to temperature change. Therefore it no guidance is possible without knowing details about the system (column oven, detector stabilization, lab temperature (fluctuations)).
Dr. Markus Laeubli
Manager Marketing Support IC
(retired)
Metrohm AG
9101 Herisau
Switzerland
2 posts Page 1 of 1

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