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- Posts: 3475
- Joined: Mon Jan 07, 2013 8:54 pm
- Location: Western Kentucky
I always have to make about 10 injections in which the sensitivity falls then levels off, which I think is the acid reaching a stable concentration after an initial loss because of volatility, but even after about a 50% drop it runs stable at a level that is almost 10x what we were seeing when she made up the mobile phase.
This one has me stumped. I can't see anything that should be in the disposable glass pipettes that would cause that much effect on the mobile phase. Anyone else ever see something like this?