The Fabrication of in Situ Triton X-100 on Multi-Walled Carbon Nanotubes Modified Gold Electrode for Sensitive Determination of Caffeine

• Published in: International journal of electrochemical science Vol. 13; no. 1; pp. 58 - 70
• Main Authors: Mukdasai, Kanit, Mukdasai, Siriboon
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2018
• Subjects: Caffeine; Differential Pulse Voltammetry; Multi-walled carbon nanotube; Triton X-100; Differential Pulse Voltammetry; Multi-walled carbon nanotube; Caffeine; Triton X-100
• ISSN: 1452-3981; 1452-3981
• DOI: 10.20964/2018.01.39

A new type of modified electrode based on a multi-walled carbon nanotubes (MWCNTs) was fabricated onto gold electrode (Au) and used to determine the electrochemical behavior of caffeine (CAF) in the presence of triton X-100 (TX-100). The MWCNTs/Au and TX-100...MWCNTs/Au were prepared by simple and rapid method. The fabricated TX-100...MWCNTs/Au showed excellent electrochemical catalytic activities towards CAF with bare AuE by differential pulse voltammetry (DPV) and offer anodic peak at 1.45 V. The oxidation potential of CAF at the TX-100...MWCNTs/Au shifted negatively and the anodic peak currents were greater than MWCNTs/Au and bare Au. In the optimum conditions, the voltammogram peak current of CAF for TX-100...MWCNTs/Au increased linearly and the linear range was from 0.58 to 11.50 µM. The limits of detection (S/N=3) for CAF was 0.08 µM. The recoveries of the CAF from spiked tea samples were 83.9–100.3%. The proposed method has high potential for use as a sensitive sensor for detection of CAF in beverage samples.