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Simultaneous quantitation of nickel and zinc in an industrial effluent using differential pulse polarography

S.T.Trivedi, P.A.Sathe, P.V.Rege

A simple and precise electroanalyticalmethod for the quantitation of nickel and zinc simultaneously from an industrial effluent has been established using differential pulse polarography. With this technique it was possible to quantitate nickel and zinc simultaneously with a validated method. The polarogram recorded for the industrial effluent in potassiumthiocyanate as a supporting electrolyte showed two cathodic peaks at -0.63 V and -0.93 V vs. saturated calomel electrode which were confirmed to be of nickel and zinc by the method of standard addition. The linear dynamic range for nickel and zinc was 0.652 µg/mL to 13.5438 µg/mL and 0.7265 µg/mL to 13.078 µg/mL respectively.