Determination of copper(II) with a carbon paste electrode modified with an ion-exchange resin

Abstract

The determination of copper(II) was studied using a carbon paste electrode modified with an ion-exchange resin (Dowex 50W-X8) using differential-pulse voltammetry. The conditions necessary for the preconcentration of copper were determined in an open circuit by ion exchange; copper levels down to 18 nM were determined. The method was applied to the determination of copper in pharmaceutical products.