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Electrochemical Determination of Serotonin Using Pre‐treated Multi‐walled Carbon Nanotube‐polyaniline Composite Electrode
Author(s) -
Koluaçık Elif,
Karabiberoğlu Şükriye Ulubay,
Dursun Zekerya
Publication year - 2018
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.201800588
Subject(s) - polyaniline , dielectric spectroscopy , materials science , carbon nanotube , cyclic voltammetry , differential pulse voltammetry , x ray photoelectron spectroscopy , electrode , detection limit , electrochemistry , electrochemical gas sensor , composite number , analytical chemistry (journal) , chemical engineering , nuclear chemistry , nanotechnology , chemistry , composite material , chromatography , polymer , engineering , polymerization
In this study, the multiwalled carbon nanotube‐poly (aniline) (MWCNT‐PANI) composite is successfully deposited on the glassy carbon electrode (GCE) by electropolymerization as an efficient and conventional route. The structural and chemical properties of the MWCNT‐PANI was investigated by various spectroscopic and analytical techniques, scanning electron microscopy (SEM), X‐Ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). After that, the electrochemical oxidation behavior of serotonin (5‐HT) in phosphate buffer solution (pH 7.4) was examined using cyclic voltammetry (CV). Besides, the MWCNT‐PANI/GCE used for the detection of 5‐HT with linear concentration range (1.0×10 −7 –1.2×10 −5 mol L −1 ), low limit of detection (3.3×10 −8 mol L −1 ) under differential pulse voltammetric (DPV) conditions. The proposed electrochemical sensor based on MWCNT‐PANI is both time and cost effective, has good reproducibility, high selectivity as well as stability for 5‐HT determination. The developed composite electrode was used to detect 5‐HT in synthetic urine sample and satisfactory results were obtained with high recoveries.