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- Posts: 2
- Joined: Tue May 15, 2018 6:14 am
I was advised to change rotor seals in 10-port valve and 6-port valve (autosampler valve). But now I do not have new rotor seals. I also try to use a ceramic emitter (liquid junction) instead of a stainless emitter but it does not help. I also check the stability of QExactive with the HESI-II source by infusion of calibration solution directly from the syringe pump (direct infusion) at 2 microliter/min for 4 hours. The signal is constant.
Has anyone faced a similar problem? Any suggestions or tips would be appreciated.