How to run electrochemical tests on Microorganism (bacteria in a medium)? I am trying to run some electrochemical tests(e.g.CV (Cyclic Voltammetry) &amp; EIS (electrical impedance spectroscopy)) using half cell configuration on micro-organisms (e.g.bacteria). The bacteria are cultured in a medium (liquid). The half cell configuration is working, counter, and a reference (AgCl) electrodes.

Usually, it is easy to clip a metal or any thin solid material. However, I don't know how to deal with a solution. Since the beaker will be filled with electrolyte, I am afraid it mixes with bacteria solution causing it to be removed from the electrode. I am avoiding add another material like tape or something as it might alter the measurement.
I am looking for a way to attach the Micro-organism to the working electrode.
From what I understand, your main issue is connecting a solution in an electrical circuit without changing the composition of the solution due to electrochemical redox reactions.
So, there are two problems here.  Firstly, passing direct current
(DC) changes the composition of the solution. Secondly, a solution cannot
be connected to the bridge like a metallic wire or any other solid conductor.
The first difficulty is resolved by using an alternating current (AC) source
of power. The second problem is solved by using a specially designed
vessel called conductivity cell.