Today I looked at the same 5mM Co series, but at a much higher concentration. Using the results I got from the dilute run, I designed a series that should encompass all the concentrations I will be seeing. After running at a higher concentration, the results look much more consistent. Actually, with the exception of the fourth sample, they look very clean and there is clear trend. It resembles the trends we were seeing last summer, but with the Mg taking longer to overcompensate for the Co. Tomorrow I will run three more trials to look at this series closely and get some averages.