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Behavior of Glassy Carbon Paste Electrode in Flowing Methanolic Solutions
Author(s) -
Dejmkova Hana,
Zima Jiri,
Barek Jiri,
Mika Jan
Publication year - 2012
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.201100598
Subject(s) - electrode , methanol , materials science , electrochemistry , glassy carbon , carbon fibers , chemical engineering , surface roughness , carbon paste electrode , analytical chemistry (journal) , composite material , chromatography , chemistry , cyclic voltammetry , organic chemistry , composite number , engineering
Carbon paste electrodes are often used for electrochemical determinations, but their application in media with high content of organic solvents, particularly in HPLC, is limited by their low stability. The work presented here examines the effect of a moving methanol‐containing solution on a glassy carbon paste electrode by studying its electrochemical behavior in relation to the period of contact and methanol content in the solution. In combination with microscopic observation of the paste surface it can be concluded that the electrode is affected by the methanolic solution and the surface roughness increases, resulting in the stable state compatible with measurements in highly methanolic solutions.