TECHNIQUE OF ELECTROCHEMICAL ANALYSIS Russian patent published in 2003 - IPC

FIELD: analysis of multicomponent solutions in wide range of concentrations, analysis of solutions in industry, ecological monitoring of water. SUBSTANCE: technique includes potentiostatic concentration of analyzed elements on working electrode, subsequent dissolution of residue under galvanostatic condition, repetition of dissolution and precipitation cycles, control over potential of working electrode and dissolution time intervals, ensuing calculation of value of charge and evaluation of concentration of determined component in sample. Second and following precipitations are conducted under galvanostatic conditions till value of potential corresponding to beginning of dissolution of determined component is achieved. Dissolution is terminated when value of potential corresponding to finish of dissolution of determined component is obtained. Direction of current is changed between operations of dissolution and precipitation, time intervals of precipitation are controlled, cycles are repeated till constancy of time intervals in each operation is secured. Value of chemical current is found by comparison of values of charges of component dissolved in each cycle. Measurements are repeated per each determined component. EFFECT: increased accuracy and sensitivity of technique of electrochemical analysis of solutions of complex chemical composition in wide range of concentrations of elements in solution under automatic mode. 3 cl, 6 dwg