Method for automatic industrial electrochemical analysis

A method for automatic titration of a plurality of samples by argentimetric coulometry which comprises:

• automatically introducing a predetermined volume v of a sample, containing a substance A to be titrated, and a predetermined volume uv of an electrolyte, into a coulometric titration zone containing a known volume V of a mixture of electrolyte and sample at the potential of equivalence, said volume V being left over from a prior sample, and wherein the reaction volume held in the titration zone is equal to V+(u+ 1)v, the ratio of sample to electrolyte equal to u;
• coulometrically titrating the sample in the titration zone by producing a determined quantity of substance B and following the reaction between substances A and B by potentiometry wherein A is the substance in the sample whose quantity is to be determined and B is the substance which reacts with A which is generated in the coulometric titration zone and repeating said titration a plurality of times, wherein said volume V remains substantially constant from sample to sample.