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Electrochemical Glutathione Sensor Based on Electrochemically Deposited Poly‐ m ‐aminophenol
Author(s) -
Oztekin Yasemin,
Ramanaviciene Almira,
Ramanavicius Arunas
Publication year - 2011
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.201000584
Subject(s) - electrode , dielectric spectroscopy , detection limit , cyclic voltammetry , electrochemistry , glassy carbon , materials science , linear range , glutathione , aqueous solution , analytical chemistry (journal) , chemistry , chromatography , organic chemistry , enzyme
Preparation and characterization of electrodes suitable for determination of glutathione is reported in this study. For this poly‐ m ‐aminophenol (P m AP), poly‐ o ‐aminophenol, and poly‐ p ‐aminophenol were electrochemically deposited from aqueous solution on the surface of glassy carbon (GC) electrode by potential cycling in the range of +0.2–+1.0 V. The modified GC electrodes were characterized by cyclic voltammetry, electrochemical impedance spectroscopy, contact angle measurement and ellipsometry. It was found that poly‐ m ‐aminophenol modified GC electrode (P m AP/GC‐electrode) is most suitable for electroanalytical determination of glutathione. An electroanalytical system for the determination of glutathione based on the P m AP/GC‐electrode was developed. The analytical system was characterized by low limit of detection, good stability, high sensitivity and wide linear detection range.