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Slow and reproducible oscillations in baseline

Posted: Fri Dec 14, 2018 4:09 pm
by Olefin
Hello all,

I am currently using a HP 5890 Series II gas chromatography instrumentation and am currently have trouble maintaining a steady baseline. The detector used in the instrument is a TCD that has a steady oscillation that increases slowly to 265000 from 260000 then quickly drops back down. This oscillation take about 30 minutes and the carrier gas is hydrogen. What can I do to remove the oscillation and have a steadier baseline?