I am having horrible problems with negative peaks that occur right before ACID peak elution on my Plot Q column with a TCD detector.
I have eliminated the sample injection, column and sample as sources of these extra negative peaks - and it seems like the detector is having problems dealing with the liquid components in my sample (all liquids - acid and water - have negative spike immediately before them, none of my gases have this problem on the same column/tCD/injection).
I tried changing the TCD Module - but the negative peaks are still present. Does anyone have anything else I can try?
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