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A New, MWCNT-Based, Solid-State Thiabendazole-Selective Sensor.

Andrea Dandić1, Ivana Novak1, Marija Jozanović1

  • 1Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.

Sensors (Basel, Switzerland)
|May 28, 2022
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Summary
This summary is machine-generated.

A new potentiometric sensor using sulfate-modified multi-walled carbon nanotubes (MWCNTs) offers accurate and cost-effective thiabendazole (TBZ) detection. This sensor demonstrates a rapid response and low detection limit, suitable for analyzing TBZ in real samples like fruit peel.

Keywords:
direct potentiometrysolid-state sensorthiabendazole

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Electrochemistry

Background:

  • Direct potentiometric measurements offer a simple, accurate, and cost-effective method for chemical analysis.
  • Multi-walled carbon nanotubes (MWCNTs) enhance sensor performance due to their unique electrical and surface properties.
  • Thiabendazole (TBZ) is an important fungicide requiring reliable detection methods.

Purpose of the Study:

  • To develop a novel potentiometric solid-state sensor for the determination of thiabendazole (TBZ).
  • To investigate the efficacy of MWCNTs modified with sulfate groups as the sensing material for TBZ detection.

Main Methods:

  • Fabrication of a solid-state potentiometric sensor using MWCNTs modified with sulfate groups and TBZ ion as the sensing material.
  • Characterization of the sensor's performance, including response range, detection limit, response time, and signal drift.
  • Validation of the sensor's applicability in complex real samples, such as fruit peel, using the standard addition method.

Main Results:

  • The developed sensor exhibited a Nernstian response for TBZ with a slope of 60.4 mV/decade.
  • The sensor operated effectively within a wide concentration range (8.6 × 10-7 to 1.0 × 10-3 M) with a low detection limit of 6.2 × 10-7 M.
  • The sensor demonstrated a fast response time of 8 s, minimal signal drift (1.7 mV/h), and successful application in real sample analysis.

Conclusions:

  • The novel MWCNT-based potentiometric sensor provides a sensitive, selective, and efficient platform for TBZ determination.
  • The sensor's performance characteristics make it a promising tool for the direct analysis of TBZ in complex matrices.
  • This approach offers a cost-effective and practical alternative for routine TBZ monitoring.