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- Posts: 3475
- Joined: Mon Jan 07, 2013 8:54 pm
- Location: Western Kentucky
Would it be the polarity of the guard column causing the problem? When doing EPA 525.3 I had to add the guard column to remove this problem with the Ethyl Acetate solvent. I am going to try some non-polar guard column and see if that helps once it arrives. Just wondering if anyone else has seen such problems before.