Maria I. Portela, Sofia Capelo^*

Departamento de Ecologia, Universidade de Évora. R. Romão Ramalho, 59, 7000-671 Évora.

Received 5 January 2004; accepted in revised form 15 April 2004

Abstract

A flux cell with vitreous carbon tubular electrodes, as auxiliary and working electrodes, was tested. The following procedure was used: (1) study and optimization of the mercury deposition conditions at the working electrode, (2) study the electrodes position and distance in order to minimize dispersion of the sample, (3) study of the linearity and reproducibility using different concentrations of manganese (2.10^-7 to 6.10^-7 M), with differential pulse anodic stripping voltammetry (DPASV) and square wave stripping voltammetry (SWSV). Good linear correlation was obtained for concentration of manganese used.

Keywords: Voltammetric cell, tubular electrodes, manganese, DPASV, SWSV.

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^*Corresponding author. E-mail address: scapelo@uevora.pt.