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Electrocatalytic Oxidation and Determination of Norepinephrine at Poly(Cresol Red) Modified Glassy Carbon Electrode
Author(s) -
Chen Wei,
Lin Xinhua,
Luo Hongbin,
Huang Liying
Publication year - 2005
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.200403199
Subject(s) - glassy carbon , electrode , electrocatalyst , cresol , chemistry , norepinephrine , carbon fibers , p cresol , electrochemistry , inorganic chemistry , materials science , organic chemistry , dopamine , cyclic voltammetry , phenol , composite material , neuroscience , composite number , biology
A glassy carbon electrode (GCE) was modified with electropolymerized films of cresol red in pH 5.6 phosphate buffer solution (PBS) by cyclic voltammetry (CV). The modified electrode shows an excellent electrocatalytic effect on the oxidation of norepinephrine (NE). The peak current increases linearly with the concentration of NE in the range of 3×10 −6 –3×10 −5 M by the differential pulse voltammetry. The detection limit was 2×10 −7 M. The modified electrode can also separate the electrochemical responses of norepinephrine and ascorbic acid (AA). The separation between the anodic peak potentials of NE and AA was 190 mV by the cyclic voltammetry. And the responses to NE and AA at the modified electrode were relatively independent.