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Electrocatalytic flow detection of amino acids at ruthenium dioxide‐modified carbon electrodes
Author(s) -
Wang Joseph,
Lin Yuebe
Publication year - 1994
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.1140060209
Subject(s) - ruthenium , graphite , carbon dioxide , electrode , inorganic chemistry , anode , cobalt , carbon fibers , materials science , carbon paste electrode , ruthenium oxide , chemistry , oxide , electrochemistry , catalysis , organic chemistry , cyclic voltammetry , composite number , composite material
Fixed‐potential anodic detection of ammo acids and peptides can be carried out at ruthenium dioxide (RuO 2 ) ‐modified carbon paste and graphite epoxy electrodes. The effect of various experimental variables on the electrocatlytic response is explored. Optimal detection is obtained under strongly alkaline conditions and a low ( + 0.45 v vs. Ag/AgCl) operating potential. With flow injection, the response is fast, linear, and reproducible )relative standard deviations of 1.5 to 1.7%, n = 32). Similar advantages are reported for the incorporation of cobalt oxide (CO 3 O 4 ) into carbon paste detectors.