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Critical Impact of Chloride Containing Reference Electrodes on Electrochemical Measurements
Author(s) -
Lämmel C.,
Heubner C.,
Liebmann T.,
Schneider M.
Publication year - 2017
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.201700379
Subject(s) - chloride , electrochemistry , electrolyte , leakage (economics) , electrode , materials science , inorganic chemistry , anode , supporting electrolyte , chemistry , metallurgy , economics , macroeconomics
Abstract Chloride containing reference electrodes, such as various silver‐silver chloride electrodes, are well established in electrochemical analyses. Usually less attention is paid to the influence of potential chloride contamination of electrochemical measurements. Herein, the impact of the chloride leakage rate is studied by means of experiments concerning the anodic oxidation of aluminum. Based on the results, the authors determine critical leakage rates, depending on typical electrolyte volumes and experimental conditions. The results demonstrate that chloride leakage can significantly influence electrochemical measurements, even at ultra‐low leakage rates. A guideline for the usage of chloride containing reference electrodes is deduced from the experimental results and theoretical considerations.