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Mika Erik Tapio Sillanpää

Electroanalytical Detection of Indigo Carmine in Presence of Tartrazine Using a Poly(dl-phenylalanine) Modified Carbon Nanotube Paste Electrode

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Kanthappa Bhimaraya, Mangalore University
  • ,
  • Jamballi G. Manjunatha, Mangalore University
  • ,
  • Hareesha Nagarajappa, Mangalore University
  • ,
  • Ammar M. Tighezza, King Saud University
  • ,
  • Munirah D. Albaqami, King Saud University
  • ,
  • Mika Sillanpää

Certain dyes are deleterious to the biological system, including animals and plants living in the water sources, soil sources, and so on. Thus, the analysis of these dyes requires a potent, quick, and cost-effective approach to the environmental samples. The present research work shows a modest, low-cost, and eco-friendly electrochemical device based on poly(dl-phenylalanine)-layered carbon nanotube paste electrode (P(PAN)LCNTPE) material for indigo carmine (ICN) detection in the presence of tartrazine. The cyclic voltammetric, field emission scanning electron microscopy, and electrochemical impedance spectroscopic methods were operated for the detection of the redox nature of ICN and electrode material surface activities, respectively. In better operational circumstances, P(PAN)LCNTPE provided better catalytic activity for the redox action of ICN than the bare carbon nanotube paste electrode. The P(PAN)LCNTPE showed good electrochemical activity during the variation of ICN concentrations ranging from 0.2 µM to 10.0 µM with improved peak current, and the limit of detection was about 0.0216 µM. Moreover, the P(PAN)LCNTPE material was performed as a sensor of ICN in a tap water sample and shows adequate stability, repeatability, and reproducibility.

Original languageEnglish
Article number461
Number of pages15
Publication statusPublished - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022 by the authors.

    Research areas

  • carbon nanotubes, electrochemical sensor, indigo carmine, poly(dl-phenylalanine), tartrazine, water samples

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