Multielement Determination in Voltammetry Using Flow Injection Generated Reagent Gradient and Multi-Way PLS

Original Paper

Abstract

A system for continuous flow analysis with a voltammetric detector was developed, employing a multichannel polarograph, capable of operating with an assembly of 31 working ultramicroelectrodes (UMEs). The flow analysis system was based on the development of an EDTA gradient on a line containing the support electrolyte and Pb(II), Cd(II) and Tl(I) ions. With the differential complexation of each ion, promoted by the EDTA gradient, diferentiations in the voltamograms were observed, which makes possible the use of a multivariate calibration, since the investigated ions presented overlapping voltammetric waves.