On-column inlet injection

[BeatsLouder]

I had a cool on-column inlet installed on my GC/MS system. I'm using the same auto-injector as before, except a different syringe support assembly was required (equipped with a needle guide for the smaller 5uL syringe). This assembly refuses to make an injection. It either smashes the needle or just faults and aborts.

I have the correct size insert, syringe needle, and septum nut for my column size. Has anybody encountered this problem??

[Peter Apps]

Yes, I've had similar problems, and they were always due to either shoddy alignment, septa/seals that were too tight, or injector parameters set wrong.

Peter