Poly(O-Phenylene Diamine) Reformed Pencil Graphite as the Disposable Electrochemical Sensor for Voltammetric Analysis of Tryptamine

• Published in: Key engineering materials Vol. 980; pp. 49 - 56
• Main Authors: Lekshmi, S.K., Harish, Chippy, Gopidas, Surya, Nair, Gayathri S., Cherian, Sherin Susan, Saraswathyamma, Beena, Murali, Aswathy S.
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 18.04.2024
• Subjects: Chemical sensors; Diamines; Electrochemistry; Graphite; Milk; Oxidation; Phenylenediamine; Polymerization; Reproducibility; Tryptamines; O-Phenylene Diamine; Tryptamine; Pencil Graphite; Electropolymerization
• ISSN: 1013-9826; 1662-9795; 1662-9795
• DOI: 10.4028/p-Jfp00Y

By means of electropolymerization process, a simple as well as proficient electrochemical sensor was developed for electrochemical resolution of tryptamine. The morphology and electrochemistry of thus fabricated poly (O-Phenylene diamine) reformed pencil graphite is evaluated thoroughly by FESEM along with DPV and CV respectively. Under experimental settings, finely resolved irreversible electro-oxidation peak at potential +0.594 V obtained for tryptamine on the altered electrode surface with phosphate buffer of pH 9 as supporting electrolyte. The oxidation peak current and tryptamine concentration are observed to possess linearity in the range of 0.4 μM to 117 μM with R2 = 0.99. Additionally the limit of detection (LOD) for tryptamine quantification is found as 0.2 μM. The sensor exhibited superior analytical properties such as high reproducibility, repeatability and anti-interference capability. The practical efficiency of fabricated sensor tested successfully in cheese obtained from milk.