The volumetric titration is based on the same principles as the coulometric titration, except that the anode solution above now is used as the titrant solution. The titrant consists of an alcohol (ROH), base (B),  and a known concentration of . Pyridine has been used as the base in this case.
One mole of  is consumed for each mole of . The titration reaction proceeds as above, and the end point may be detected by a bipotentiometric method as described above.