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Optimization of Response of the Silver Oxide Electrode for the Detection of Carbohydrates and Related Compounds
Author(s) -
DeMott James M.,
Tougas Terrence P.,
Jahngen Edwin G. E.
Publication year - 1998
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/(sici)1521-4109(199809)10:12<836::aid-elan836>3.0.co;2-g
Subject(s) - electrode , substrate (aquarium) , oxide , conditioning , reference electrode , palladium hydrogen electrode , electrode potential , quinhydrone electrode , standard hydrogen electrode , response surface methodology , chemistry , inorganic chemistry , glass electrode , layer (electronics) , working electrode , materials science , analytical chemistry (journal) , chromatography , electrochemistry , organic chemistry , oceanography , statistics , mathematics , geology
The response of the silver oxide electrode to carbohydrates, polyhydroxy compounds and amines is dependent on several factors. These include the number of oxidizable groups on the substrate and the way in which the electrode surface is prepared, including the potential program, the thickness of the oxide layer, the surface area and the presence of other species in the solution during electrode conditioning. Studies of these factors led to a pulsed potential program for the conditioning and maintenance of electrode stability, with the incorporation of phosphate during the initial conditioning process. This method led to a response to 10 −4 M glucose, which was reproducible for at least forty repeated injections and stable for at least four hours with a relative standard deviation of 5.2 %. This response was also reproducible on successive days when the electrode was prepared in the same manner.