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A polytryptophan‐modified electrode
Author(s) -
Narasaiah D.,
Mitra Chanchal K.
Publication year - 1993
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.1140050710
Subject(s) - ferrocyanide , electrode , cyclic voltammetry , electrochemistry , reference electrode , materials science , polymer , inorganic chemistry , potassium ferrocyanide , biosensor , chemistry , analytical chemistry (journal) , nanotechnology , composite material , organic chemistry
A conducting polymer film has been formed on a Pt‐wire mesh by electrochemical oxidation of tryptophan from acidic and alkaline solutions. The electrochemical characteristics of the film have been studied both by cyclic voltammetry and impedance studies. For both p ‐benzoquinone and potassium ferrocyanide, the peak currents are only slightly lower compared to bare electrode, but the background currents are considerably reduced. The polymer film is not acting as a mediator and is chemically stable, but it is electrochemically unstable outside the potential range of −700 to 800 mV (vs. SCE). Possible uses of this modified electrode in biosensors are discussed.