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

• Published in: International journal of environmental analytical chemistry Vol. 99; no. 15; pp. 1540 - 1552
• Main Authors: Cittan, Mustafa, Çelik, Ali
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 08.12.2019; Taylor & Francis LLC
• Subjects: adsorption; Adsorptivity; Analysis; Aqueous solutions; Carbon; Circuits; Correlation coefficient; Correlation coefficients; Detection; Electrochemistry; Electrodes; Eriochrome Black T; Glassy carbon; linear sweep voltammetry; Methods; Multi wall carbon nanotubes; multi-walled carbon nanotubes; Nanotechnology; Nanotubes; Spectrophotometry; Stripping; Voltammetry; Well water
• ISSN: 0306-7319; 1029-0397
• DOI: 10.1080/03067319.2019.1625342

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.