DIFFERENTIAL CHRONOAMPEROMETRY IN THE ANALYSIS OF WATER

Differential chronoamperometry, combined with conventional voltammetry techniques, for example, those using catalytic reactions, holds great promise for direct highly sensitive determination of active electroch emical compounds in the analysis of natural and effluent waters at a s ignal level of 5 x 10(-10) - 1 x 10(-9)A. The use of appropriately pre pared reference solutions makes it possible to suppress undesired effe cts due to interfering contaminants and the high ohmic resistance of t he analyte solution. To demonstrate the potentialities of this method, Cu, Ni, Co, Cr(III), Cr(VI), and Ti were analyzed in model solutions and in river water.