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<p>A novel poly(l-serine) modified carbon nanotube paste electrode (PSR/MCNTPE) was developed using an electropolymerization method for the simultaneous analysis of synthetic dyes Indigo Carmine (IC), Fast Sulphon Black F (FB), and Tartrazine (TT). Characterization of both the PSR/MCNTPE and bare carbon nanotube paste electrode (BCNTPE) was carried out using scanning electron microscopy (SEM), FTIR (Fourier Transform Infrared spectroscopy) and EDX (Energy-dispersive X-ray spectroscopy). The Electrochemical responses of IC, FB, and TT were studied using cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). The results demonstrated that the PSR/MCNTPE showed a favorable performance for the simultaneous determination of IC, FB, and TT. PSR/ MCNTPE exhibited broad linear detection ranges for IC, FB, and TT within 10–110 µM, 10–120 µM, and 10–130 µM, respectively. The detection limits 0.36 µM for IC, 0.76 µM for FB, and 0.81 µM for TT. In addition, PSR/MCNTPE demonstrated reliable selectivity, stability, and reproducibility, making it suitable for the simultaneous electrochemical analysis. Interferents studies conducted with various metal ions and organic molecules conformed minimal signal deviation, while its applicability was further supported by satisfactory results obtained from real sample analysis.</p> Graphical Abstract <p></p>

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Concurrent electrochemical detection of synthetic dyes indigo carmine, fast sulphon B-lack F, and tartrazine using a poly(L-Serine) modified carbon nanotube paste electrode

  • 期刊论文

  • 发表日期：

    2026年2月23日

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  • D. Sumanth,
  • J. G. Manjunatha,
  • P. A. Pushpanjali,
  • Samar A. Aldossari,
  • P. S. Ganesh

摘要

A novel poly(l-serine) modified carbon nanotube paste electrode (PSR/MCNTPE) was developed using an electropolymerization method for the simultaneous analysis of synthetic dyes Indigo Carmine (IC), Fast Sulphon Black F (FB), and Tartrazine (TT). Characterization of both the PSR/MCNTPE and bare carbon nanotube paste electrode (BCNTPE) was carried out using scanning electron microscopy (SEM), FTIR (Fourier Transform Infrared spectroscopy) and EDX (Energy-dispersive X-ray spectroscopy). The Electrochemical responses of IC, FB, and TT were studied using cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). The results demonstrated that the PSR/MCNTPE showed a favorable performance for the simultaneous determination of IC, FB, and TT. PSR/ MCNTPE exhibited broad linear detection ranges for IC, FB, and TT within 10–110 µM, 10–120 µM, and 10–130 µM, respectively. The detection limits 0.36 µM for IC, 0.76 µM for FB, and 0.81 µM for TT. In addition, PSR/MCNTPE demonstrated reliable selectivity, stability, and reproducibility, making it suitable for the simultaneous electrochemical analysis. Interferents studies conducted with various metal ions and organic molecules conformed minimal signal deviation, while its applicability was further supported by satisfactory results obtained from real sample analysis.

Graphical Abstract