Determination of Serotonin on a Glassy Carbon Electrode Modified by Electropolymerization of Meso-Tetrakis(2-aminophenyl)porphyrin and Single Walled Carbon Nanotubes
Authors: Kim, Seul Ki; Ahmed, Mohammad Shamsuddin; Jeong, Haesang; You, Jung-Min; Jeon, Seungwon
Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 3, March 2011 , pp. 2407-2412(6)
Publisher: American Scientific Publishers
Abstract:A chemically modified electrode [poly(TAPP)-SWNT/GCE] was prepared by electropolymerization of meso-tetrakis(2-aminophenyl)porphyrin (TAPP)-single walled carbon nanotubes (SWNT) on the surface of a glassy carbon electrode (GCE). This modified electrode was employed as an electrochemical biosensor for the determination of serotonin concentration and exhibited a typical enhance effect on the current response of serotonin and lower oxidation overpotential. The biosensor was very effective to determined 5-HT in a mixture. The linear response was in the range 2.0 × 10−7 to 1.0 × 10−5 M, with a correlation coefficient of 0.999 [ip(A) = 3.406 C (M) + 0.132] on the anodic current, with a detection limit of 1 × 10−9 M. Due to the relatively low currents and different potentials in the electrochemical responses to ascorbic acid and dopamine, the modified electrode is a useful and effective sensing device for the selective and sensitive serotonin determination in the presence of ascorbic acid and dopamine.
Document Type: Research Article
Publication date: 2011-03-01
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