Performing an electrokinetic treatment on different samples includes identifying an electrical signal that is appropriate for use in the treatment of each sample. The identification of the electrical signals results in different electrical signals being identified for different samples. The electrokinetic treatment of a sample results in that sample being exposed to the electrical signal identified for that sample. Accordingly, different samples are exposed to different electrical signals. An electrokinetic treatment employs one or more electrokinetic phenomena to cause movement of one or more agents within the sample relative to the sample. In some instances, the method also includes using each of the electrokinetically treated samples to generate an electrochemical sample and then performing an electrochemical analysis on each of the electrochemical samples.