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- Posts: 1
- Joined: Mon Jan 14, 2019 1:39 pm
This is my first post to the Forum, and I'm a relatively new user of GCs, other than during my degree course, however I have recently started a job in the Scotch Whisky industry and I'm just looking for a little knowledge/advice as I get to grips with running the instrument (Agilent 7890).
Apologies for the length of post, hoping to explain everything clearly.
Basically, the lab runs whisky samples (in the range 40% - 94% Abv) through a CP-wax 57 CB FS (50m x 0.25mm 0.2µm film thickness) column to quantify the Higher Alcohol compounds ( Acetaldehyde, Acetal, Methanol, Iso Butanol etc.).
Liner, septum and gold seal were all changed recently. I've ran some samples of known values, and was getting varying results, so I ran some blank samples of 40% Ethanol (separate vials, from the same batch of analytical grade Ethanol) and got the below chromatograms:
Basically, just looking for any advice, does this look likely to be an issue with the column?
Thanks!