Affordable surfactant modified carbon nanotube sensor for the enhanced electrochemical detection of eugenol

In this work, a responsive voltammetric electrode was fabricated for the electrochemical analysis of eugenol (EU) by fabricating a bare carbon nanotube electrode (BCNTE) with sodium dodecyl sulfate (SDS/MWCNT). The surface characteristics and electrochemical behavior of SDS/MWCNT were examined using scanning electron microscopy (SEM), cyclic voltammetry (CV), and linear sweep voltammetry (LSV). The developed sensor showed an enhanced surface area for the detection of the electrochemical response of the EU. The scan rate study at optimum pH 6.5 revealed that the process was adsorption-controlled with the involvement of two electrons and two protons. The prepared electrode displayed excellent response to EU within the concentration range of 0.4 to 90.0 mu M with a detection limit (LOD) of 0.409 mu M, limit of quantification (LOQ) of 1.365 mu M, and a sensitivity of 0.794 mu A mu M-1 cm-2. The selectivity of the electrode towards EU was not affected by the presence of vanillin (VN) and other interferents. Moreover, the fabricated electrode showed acceptable repeatability, reproducibility, and stability. The developed electrode was validated for the analysis of EU in real samples using clove oil, clove bud, and curry powder, showing a good recovery rate of 94.90-100.47%.