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- Posts: 5
- Joined: Fri Sep 11, 2020 8:00 pm
I have had some repeatability issues and higher than expected quantitative results as of late. I am running a splitless injection method on Agilent GC-MS single quad. This method has only three peaks of interest. Tautomers allyl-isothiocyanate and allyl thiocyanate with 2-undecanone IS. There is no sign of column bleed. I have significant peak fronting and have been told that the counts I'm seeing are high/consistent with overload by tech support.
I have clipped the column quite a few times, so I am wondering if shortening a 30mm column by a few meters (maybe 2) would cause a significant change in capacity. Inlet maintenance has been done. I don't want to throw away a perfectly useable column if I can avoid it. I am currently injecting at 10% of the syringe volume, so decreasing the injection volume is not an option without buying a new syringe.
Any ideas?