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Related Concept Videos

Potentiometry: Types of Electrodes01:19

Potentiometry: Types of Electrodes

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Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
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Voltammetry: Overview01:20

Voltammetry: Overview

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Voltammetry is an electroanalytical technique in which the current flowing through an electrochemical cell is measured as a function of applied potential, typically under conditions of concentration polarization. The technique provides valuable information about redox-active species, and the current response is plotted as a voltammogram.
A voltammetric cell uses three electrodes: a working electrode, a reference electrode, and an auxiliary electrode. The redox reactions occur in the working...
1.8K
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

624
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...
624
Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

202
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
202
Potentiometry: Overview01:06

Potentiometry: Overview

2.2K
Potentiometry is an analytical technique that measures the potential difference between two electrodes in an electrochemical cell without drawing any significant current that could alter the solution's composition. This method employs an indicator electrode, which exchanges electrons with the analyte solution, and a reference electrode with a constant potential. Each electrode is immersed in a solution comprised of two half-cells. In a conventional setup, the reference electrode serves as...
2.2K
Amperometry: Overview01:10

Amperometry: Overview

601
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...
601

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Updated: Jul 17, 2025

Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation
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Correction: Voltammetric pH sensor based on electrochemically modified pseudo-graphite.

Haoyu Zhu1, Tanim Hassan1, Humayun Kabir1

  • 1University of Idaho, Department of Chemistry, 875 Perimeter Dr, MS 2343, Moscow, ID, 83844, USA. ifcheng@uidaho.edu.

The Analyst
|September 7, 2023
PubMed
Summary
This summary is machine-generated.

This correction clarifies details for a voltammetric pH sensor. The study focuses on electrochemically modified pseudo-graphite for improved sensing capabilities.

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Area of Science:

  • Electrochemistry
  • Analytical Chemistry
  • Materials Science

Context:

  • The original study presented a novel voltammetric pH sensor.
  • Pseudo-graphite was electrochemically modified to enhance sensor performance.
  • The sensor aimed for accurate and sensitive pH measurements.

Purpose:

  • To correct specific details within the original publication.
  • To ensure the accuracy of the presented voltammetric pH sensor data.
  • To provide a revised understanding of the electrochemically modified pseudo-graphite material.

Summary:

  • This correction addresses inaccuracies in the original article concerning the voltammetric pH sensor.
  • Specific experimental parameters and data interpretations have been revised.
  • The core findings regarding the electrochemically modified pseudo-graphite remain relevant.

Impact:

  • Ensures the integrity and reliability of scientific data in analytical chemistry.
  • Provides a corrected reference for researchers working with voltammetric sensors.
  • Facilitates accurate replication and further development of pH sensing technologies.