A novel sensor behaviour of SDAB/MWCNTs to detect Cd(II) by electrochemical technique using oryza sativa L, egg yolk and camellia sinensis

Abstract

The present research endeavors to create a mercury-free electrode employing MWCNTs (nanotubes)/ SDAB ligand for measurement of Cd (II) via stripping voltammetry. In SEM with EDX, the modified electrode SDAB/MWCNTs/PGE surface morphology, which was observed as a grass clouds shaped like-crystal structure, and the preconcentration of Cd(II)-SDAB/MWCNTs/PGE was observed as a square cube like crystal structure. As determined by electrochemical impedance spectroscopy, the conductance (σ) values for MWCNTs/PGE and SDAB/MWCNTs/PGE-modified electrodes are 225 x 10-5 S cm-1 and 393.5x10-5 Scm-1 respectively. As a result, an electrochemical sensor with superior repeatability, stability, and anti-interference capabilities for Cd(II) was developed. The stripping analysis of Cd(II) was used to investigate by SWASV and CV methods. Using SWASV, the linear range of the Cd(II) response was determined to be between 2.3 and 120.4 μgL-1, with a limit of detection of 0.7 μgL-1. Lastly, the outcomes of the recovered value of Cd(II) in freshly prepared Oryza sativa L., egg yolk, and Camellia sinensis samples by SWASV are compared using atomic absorption spectroscopy (AAS).