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Related Concept Videos

Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

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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...
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Electrogravimetric Analysis: Overview01:30

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Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
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Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

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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...
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Potentiometry: Types of Electrodes01:19

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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.
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Updated: Apr 23, 2026

Double-barreled and Concentric Microelectrodes for Measurement of Extracellular Ion Signals in Brain Tissue
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Enhanced electroanalysis in lithium potassium eutectic (LKE) using microfabricated square microelectrodes.

Damion K Corrigan1, Ewen O Blair, Jonathan G Terry

  • 1School of Chemistry, EaStCHEM, The University of Edinburgh , Joseph Black Building, The King's Buildings, West Mains Road, Edinburgh, EH9 3JJ, Scotland (U.K.).

Analytical Chemistry
|October 7, 2014
PubMed
Summary
This summary is machine-generated.

New microfabricated square microelectrodes (MSMs) enable precise electrochemical analysis in harsh molten salt environments. These robust electrodes offer accurate measurements for redox species at high temperatures, crucial for nuclear reprocessing and energy storage.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Molten salts (MSs) are vital for chemical processing but pose analytical challenges due to corrosivity, high temperatures, and convection.
  • Developing robust analytical tools for MSs is critical for applications like nuclear fuel reprocessing and advanced batteries.

Purpose of the Study:

  • To fabricate and characterize microfabricated square microelectrodes (MSMs) for reliable electrochemical analysis in molten salt systems.
  • To assess the performance of MSMs in high-temperature molten salt environments, focusing on their stability and measurement accuracy.

Main Methods:

  • Fabrication of microfabricated square microelectrodes (MSMs) with designs optimized for high-temperature operation and corrosion resistance.
  • Electrochemical characterization of MSMs in lithium chloride/potassium chloride eutectic (LKE) molten salt between 400-500 °C.
  • Analysis of redox species responses, diffusion coefficients, and electrode behavior compared to macroelectrodes.

Main Results:

  • MSMs demonstrated quantitative and typical microelectrode responses for redox ions at high temperatures.
  • Reduced iR drop, steady-state diffusion-limited response, and decreased sensitivity to convection were observed, consistent with microelectrode behavior.
  • Accurate diffusion coefficients were obtained, surpassing previous macroelectrode and microelectrode measurements in precision and accuracy.

Conclusions:

  • MSMs offer a robust and enhanced platform for electrochemical analysis in challenging molten salt environments.
  • The developed electrodes are suitable for characterizing redox species in various MS systems, including applications in nuclear reprocessing and energy storage.
  • MSMs facilitate the extraction of physical parameters from redox mixtures and support prolonged online monitoring.