Re: What exactly the retesting ios? Is re-analysis and retesting the same?
Hello there!
My knowledge in setting up HPLC's is quite limited. Not sure if there are those here that are proficient with the equipment.
I ask that maybe consider providing some more detail regarding your study. And for those that are slow like me

, maybe spell things out a little more, including the chemical bases you are using on it.
I think we can help out some, if we get some more detail.