An electrochemical sensing platform for trace analysis of Eriochrome Black T using multi-walled carbon nanotube modified glassy carbon electrode by adsorptive stripping linear sweep voltammetry
No Thumbnail Available
Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
A highly sensitive electrochemical sensing platform was proposed for trace analysis of Eriochrome Black T in aqueous solutions by adsorptive stripping linear sweep voltammetry based on the open-circuit accumulation of Eriochrome Black T onto the fabricated multi-walled carbon nanotubes modified glassy carbon electrode surface. The proposed methodology was quite linear between 0.1 and 10 µM of Eriochrome Black T concentration with a correlation coefficient of 0.9981. The precision of the technique was acceptable with the relative standard deviations of lower than 13.4% for inter-day assays. In addition, the sensitivity properties of the proposed method were compared with those of the spectrophotometric method, which is frequently used in the literature for Eriochrome Black T analysis. The results showed that the proposed electrochemical sensing platform would be a more sensitive alternative to the existing spectrophotometric techniques. Finally, the methodology was successfully applied to the determination of Eriochrome Black T in a well water spiked at different concentration levels. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
Description
Keywords
Adsorption , Electrochemical sensors , Glass , Glass membrane electrodes , Nanotubes , Spectrophotometers , Spectrophotometry , Trace analysis , Voltammetry , Yarn , Correlation coefficient , Electrochemical sensing , Eriochrome black T , Linear sweep voltammetry , Modified glassy carbon electrode , Relative standard deviations , Sensitivity properties , Spectro-photometric method , Multiwalled carbon nanotubes (MWCN)