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- Posts: 10
- Joined: Fri Oct 14, 2016 9:41 pm
I'm having some issues with recovery of some analysts for my 515.4 analysis. Picloram and Aciflourofen namely. I'm following the method as written except for the addition of the copper sulfate. It seems that when I re-inject a standard as a control check (CCC) the concentrations of these two analyst are failing low. I could see this happening if the run was long (50+ samples) but it is happening within 10 injections of the first. Each injection is about an hour long.
Any insights would be helpful. If you would like to chat more directly my email is mdewald@nd.gov