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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

580
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
580
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  3. Research Domains
  5. Agricultural, Veterinary And Food Sciences
  7. Agricultural Biotechnology
  9. Agricultural Biotechnology Diagnostics (incl. Biosensors)
  11. Non-enzymatic Electrochemical Impedance Sensor For Selective Detection Of Electro-inactive Organophosphate Pesticides Using Zr-mof/zro2/mwcnt Ternary Composite.
  1. Home
  3. Research Domains
  5. Agricultural, Veterinary And Food Sciences
  7. Agricultural Biotechnology
  9. Agricultural Biotechnology Diagnostics (incl. Biosensors)
  11. Non-enzymatic Electrochemical Impedance Sensor For Selective Detection Of Electro-inactive Organophosphate Pesticides Using Zr-mof/zro2/mwcnt Ternary Composite.

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Non-enzymatic electrochemical impedance sensor for selective detection of electro-inactive organophosphate pesticides using Zr-MOF/ZrO2/MWCNT ternary composite.

N Gokila1, Yuvaraj Haldorai2, P Saravanan3

  • 1Advanced Materials and Devices Laboratory (AMDL), Department of Nanoscience and Technology, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.

Environmental Research
|March 10, 2024

View abstract on PubMed

Summary
This summary is machine-generated.
Keywords:
And sulphurFruits and vegetablesGlassy carbon electrodeMetal-organic framework

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A new sensor detects organophosphate pesticides (OPPs) in food. This low-cost method uses a composite material for highly selective and sensitive pesticide screening, ensuring food safety.

Area of Science:

  • Environmental Chemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Pesticide residues in food pose significant health risks.
  • There is a critical need for cost-effective methods to detect organophosphate pesticides (OPPs).

Purpose of the Study:

  • To develop a low-cost, selective sensor for detecting organophosphate pesticides (OPPs) in food samples.
  • To synthesize and characterize a novel ternary composite for sensor applications.

Main Methods:

  • Solvothermal synthesis of a ternary composite: multi-walled carbon nanotubes (MWCNT), zirconium oxide, and a zirconium-metal-organic framework (Zr-MOF).
  • Characterization using XRD, FESEM, FTIR, and BET.
  • Fabrication of a composite-modified glassy carbon electrode for electrochemical sensing.
Phosphorous
ZrO(2)

Main Results:

  • The ternary composite exhibited a high surface area (1158 m²/g), enhancing sensor performance.
  • The sensor demonstrated high selectivity for OPPs containing both phosphorus and sulfur.
  • Achieved low detection limits for five OPPs, ranging from 1.11 to 2.8 nM.
  • The electrode showed excellent stability (93% after 100 cycles), repeatability, and shelf life.

Conclusions:

  • The developed sensor offers a reliable and sensitive platform for the qualitative, real-time detection of OPPs.
  • This method provides a promising approach for ensuring food safety by screening pesticide residues.