Kinetic-Thermometric determination of nickel(II) based on its catalytic action in the decomposition reaction of permanganate

Abstract

A kinetic-thermometric method was developed for the determination of trace amounts of nickel(II), based on its catalytic effect on the decomposition of permanganate in basic media. The reaction rate was obtained graphically from the temperature-time curve, the slope of which is proportional to the Ni^II concentration within the range 100–900 µg l^–1. The relative standard deviation for 500 µg l^–1 of nickel was 1.5%. The proposed method was used for the determination of nickel in various petroleum derivatives.