Abstract
The bare carbon nanotube paste electrode (BCNTPE) is a helpful base material for the construction of different electrometric sensors for analytical purposes. The BCNTPE was chemically modified with a polymerization process using titan yellow (TY) dye for the selective determination of riboflavin (RF) in presence of dopamine (DA). A poly(titan yellow) modified carbon nanotubes paste electrode (PTYMCNTPE) has been constructed by a simple and eco‐friendly procedure. The PTYMCNTPE material surface was examined by cyclic voltammetry (CV), Field emission‐scanning electron microscopy (FE‐SEM), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV) methods. The outcomes suggested that the modified electrode displays high electrocatalytic action for the redox reaction of RF. The limit of detection (LOD) and limit of quantification (LOQ) for the detection of RF were found to be 2.679×10−8 M and 8.932×10−8 M, correspondingly. The proposed sensor was effectively applied for the determination of RF in a pharmaceutical sample.
This work presents the simplest, sensitive, selective, and low‐cost PTYMCNTPE development for the electrochemical assessment of RF in presence of dopamine. The electrochemical redox nature of RF was discussed using CV and DPV methods. The surface features of the PTYMCNTPE and BCNTPE materials were analyzed by EIS, FE‐SEM, and CV methods. The PTYMCNTPE shows a lower LOD of 2.863×10−8 M for RF with acceptable reproducibility and stability. The practicability of the sensor was tested in a pharmaceutical sample with fine recoveries.