Simultaneous quantitation of Nickel and Zinc in an industrial effluent using Sampled D.C. Polarography

A simple and precise electroanalytical method for the quantitation of nickel and zinc simultaneously from an industrial effluent has been established using sampled D. C. 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 potassium thiocyanate as a supporting electrolyte showed two cathodic peaks at −0.67V and -0.98V 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 2.795 μg/mL to 18.214 μg/mL and 3.114 μg/mL to 20.293 μg/mL respectively.