I recently ran several hundred propane samples on a shimadzu gas chromatograph (model 14A) over the last two weeks. Now I can't get the baseline to stay level (it drifts upwards) even after the machine has been up and running for 2+ hours.
Is this a problem with the column (i.e. cracked or needing to be cleaned)? Anyone have any good advice/tips for maintaining a standard "workhorse" GC like the 14A?