Week 9: Flow-through column for nZVI detection

So I have successfully setup a pump-solution-through-column system.
I have done couple experiments, and the glass-packed column seems to be behaving similarly as not-packed column. The magnitude of absolute phase shift increased, probably because there is less electrolytes present in the column as the glass beads are taking large portion of volume in the column. 

Here is a graph that shows this trend:

In lower frequency range, the values seem to decrease to a certain value as nZVI concentration increases. This can be used to tell whether nZVI is present near the IP setup.