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Characterization and Application of Bismuth‐Film Modified Graphite‐Polyurethane Composite Electrodes
Author(s) -
Cesarino Ivana,
GouveiaCaridade Carla,
Pauliukaitė Rasa,
Cavalheiro Éder T. G.,
Brett Christopher M. A.
Publication year - 2010
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200970003
Subject(s) - graphite , nafion , bismuth , materials science , electrode , composite number , polyurethane , anodic stripping voltammetry , stripping (fiber) , electrochemistry , dielectric spectroscopy , cyclic voltammetry , voltammetry , nuclear chemistry , inorganic chemistry , analytical chemistry (journal) , chemistry , composite material , chromatography , metallurgy
Bismuth films (BiF) deposited in situ on graphite‐polyurethane composite electrodes were successfully used for the determination of Zn, Cd, Pb, Cu and Hg, simultaneously in acetate buffer solution pH 4.5 using square wave anodic stripping voltammetry. It is possible to determine metals reoxidized at potentials more negative and more positive than Bi using in situ deposited BiF; reoxidation was studied by electrochemical impedance spectroscopy. The BiF‐modified electrode was applied to analyse tap water. The influence of surface‐active compounds, Triton X‐100 and bovine serum albumin, on the stripping of these metals was investigated; Nafion coatings did not significantly improve the performance.