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Amperometry: Overview01:10

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Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
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Updated: Jun 12, 2026

Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen
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Published on: June 3, 2018

Advanced green electrochemical pH sensor using phyto-cardamom modified electrode.

Sariga1, Samriddhi Chatterjee1, Mansi Gandhi1

  • 1Department of Chemistry, Christ University, Bangalore 560029, India.

Food Chemistry
|June 10, 2026
PubMed
Summary
This summary is machine-generated.

This study presents a novel, eco-friendly electrochemical pH sensor using phyto-cardamom anchored on carbon nanotubes. The sensor offers accurate and durable pH detection across acidic and alkaline ranges, outperforming traditional glass electrodes.

Keywords:
ElectrochemicalGreen synthesisPhyto-moleculeRedox mediatorpH sensor

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Sensor Technology

Background:

  • Traditional glass pH electrodes suffer from fragility, alkaline range inaccuracies, complex fabrication, and high costs.
  • There is a growing need for cost-effective, accurate, and durable electrochemical pH sensors.

Purpose of the Study:

  • To develop a green synthesis protocol for a novel electrochemical pH sensor.
  • To create a sensor effective across both acidic and alkaline pH ranges.
  • To demonstrate the sensor's reliability for real-world applications.

Main Methods:

  • Electrochemical anchoring of phyto-cardamom onto a multiwalled carbon nanotube-coated glassy carbon electrode (GC/MW@CA).
  • Characterization using cyclic voltammetry (CV) and differential pulse voltammetry (DPV).
  • Testing with standard buffer solutions, fruit juices, and saliva using a screen-printed electrode (SPE).

Main Results:

  • The developed sensor (GC/MW@CA) exhibited high surface roughness and distinct redox behavior.
  • Improved electron transfer, fast response times, and anti-interference properties were observed.
  • A clear shift in peak potentials with varying pH confirmed sensor specificity, with <2% relative error in real sample analysis.

Conclusions:

  • The phyto-cardamom-based electrochemical sensor provides a cost-effective and accurate alternative to traditional pH electrodes.
  • The green synthesis approach offers a sustainable method for sensor fabrication.
  • The sensor demonstrates high reliability and accuracy for practical, real-world pH measurements.