Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/5153
Title: Cathodic stripping voltammetry of trace Mn(II) at carbon film electrodes
Authors: Filipe, Olga M. S. 
Brett, Christopher M. A. 
Keywords: Manganese; Trace metals; Cathodic stripping voltammetry; Chronoamperometry
Issue Date: 2003
Keywords: Manganese; Trace metals; Cathodic stripping voltammetry; Chronoamperometry
Issue Date: 2003
Citation: Talanta. 61:5 (2003) 643-650
Abstract: A sensitive voltammetric method is presented for the determination of tract levels of Mn (II) using carbon film electrodes fabricated from carbon resistors of 2 [Omega]. Determination of manganese was made by square wave cathodic stripping voltammetry (CSV), with deposition of manganese as manganese dioxide. Chronoamperometric experiments were made to study MnO2 nucleation and growth. As a result, it was found to be necessary to perform electrode conditioning at a more positive potential to initiate MnO2 nucleation. Under optimised conditions the detection limit obtained was 4 nM and the relative standard deviation for eight measurements of 0.22 nM was 5.3%. Interferences from various metal ions on the response CSV of Mn(II) were investigated, namely Cd(II), Ni(II), Cu(II), Cr(VI), Pb(II), Zn(II) and Fe(II). Application to environmental samples was demonstrated.
URI: http://hdl.handle.net/10316/5153
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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