FIELD: determination of concentration of anolyte in carrier. SUBSTANCE: invention deals with determination of concentration of reduced ( oxidized ) form of substances of oxidation-reduction technology in electrochemical cell that includes working electrode and counterelectrode so distant from working electrode that reaction products from counterelectrode reach working electrode. Process involves stages of application of electric potential between electrodes so that oxidation-reduction is controlled by means of diffusion, determination of current as time function, evaluation of value of current of stationary condition, change of polarity of potential, repeat determination of current as time function and evaluation of changed stationary condition of potential. EFFECT: improved measurement accuracy, decreased measurement time, exclusion of effect of oxygen and enhanced reliability of process. 12 cl, 11 dwg, 1 tbl
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