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Potentiometric monitoring of proteins: Part 5. A voltammetric study of copper electrodes
Author(s) -
Hitchman Michael L.,
Trojanowicz Marek
Publication year - 1992
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.1140041005
Subject(s) - copper , potentiometric titration , electrode , chemistry , inorganic chemistry , biomolecule , chelation , copper oxide , organic chemistry , biochemistry
A voltammetric study has been made of copper electrodes in the presence and absence of amino acids and proteins. The results are discussed in terms of oxide formation on the copper surface and the complexation of the biomolecules with the copper. It is shown that in the presence of strongly complexing ligands, the copper surface is effectively self‐cleaning, and reproducible potentiometric results can be obtained without any rigorous electrode precleaning procedures. In the presence of weakly complexing ligands, on the other hand, it is shown why it is necessary to reduce the electrode surface beforehand in order to carry out reproducible potentiometry.