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Carbon electrodes in amine analysis: Effect of chemically modified carbon surfaces on signal quality and reproducibility
Author(s) -
Surmann Peter,
Peter Bernhard
Publication year - 1996
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.1140080716
Subject(s) - electrode , differential pulse voltammetry , reproducibility , carbon fibers , chemical stability , adsorption , chemical modification , materials science , glassy carbon , voltammetry , chemistry , chemical engineering , cyclic voltammetry , inorganic chemistry , chromatography , organic chemistry , electrochemistry , polymer chemistry , composite material , composite number , engineering
The preparation of chemically modified graphite electrodes by various chemical treatments is described. These electrodes were tested with chlorpromazine, cyclopiroxolamine, sulfathiazole, bamipine, sparteine and diphenhydramine by differential pulse voltammetry. Compared with the unmodified and freshly polished carbon electrodes, the modified ones exhibit attractive properties such as enhanced stability against film formation. The initial signals at untreated electrodes are very high and decrease rapidly, but at pretreated electrodes the stability of the signals is usually improved. Adsorption and poisoning by film formation is suppressed by giving the surface of the electrode a chemical identity by chemical pretreatment. The improvements are not general but individual ones.