Coulometric Microtitrator

Titrations can be automated on a miniature scale for rapid analysis of small sample volumes by coulometric generation of acid or base and relying on diffusional mixing. 

microtitrator_photo

The reaction is carried out on top of the planar electrodes in the centre of the channel.

microtitrator_curves

Titration curves, first derivatives and calibration plot for different ammonia concentrations.