While doing PAH analysis for dirty samples with splitless GC I saw increased peak tailing and loss of response, so I did what anybody would do: changed my GC inlet liner. In this case I used a Restek Premium single taper inlet liner with wool. Unfortunately when I did my next standard analysis, not much was improved. While sometimes an inlet liner change is indeed enough to restore performance, in this case it wasn’t, and so I changed the gold dual vespel ring inlet seal at the inlet bottom and trimmed the column slightly. Problem solved!
