Simultaneous Spectrophotometric Determination of Copper(II) and Nickel(II) Using Dimethylglyoxime as a Reagent

Abstract

Conditions have been developed for the simultaneous determination of
copper(II) and nickel(II) in mixtures using ammoniacal dimethylglyoxime
solution as a reagent. The Beer's law ranges for copper(II) and nickel(II)
are 5.1-91.6 and 0.2-2.5  μg/mL at 590 nm and 440 nm respectively. The
molar absorptivity is 2.42 x 10² 1. mol^-1 cm^-1 for copper(II) at 590 nm
and 1.44 x 10⁴ 1.mol^-1 cm^-1 for nickel(II) at 440 nm. Effect of diverse
ions has been studied. The method is applied successfully in some alloys
as well as in synthetic mixtures.