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Liquid chromatography and electrochemical detection of alditols and acidic sugars at a cobalt phthalocyanine‐containing chemically modified electrode
Author(s) -
Tolbert Andre M.,
Baldwin Richard P.
Publication year - 1989
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.1140010503
Subject(s) - chemistry , cobalt , electrochemistry , electrocatalyst , electrolysis , phthalocyanine , organic chemistry , electrode , carbon fibers , inorganic chemistry , materials science , composite material , composite number , electrolyte
Chemically modified carbon paste electrodes containing incorporated cobalt phthalocyanine (CoPC) were shown to exhibit an electrocatalytic response for the oxidation of carbohydrate derivatives from the alditol and aldonic, uronic, and aldaric acid families. The electrocatalysis, which is similar to that previously seen for simple carbohydrates, resulted in the electrolysis of these compounds between +0.4 and +0.6 V vs. Ag/AgCl where Co(II)PC is oxidized to Co(III)PC. The response was greatest for the alditols and decreased from the aldonic to the aldaric acids. When used to quantify these compounds following anion exchange chromatography, detection limits at +0.42 V ranged from 10 pmol for the alditols to the nanomole level for some of the aldaric acids.