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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

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 the...
Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
Amperometry: Overview01:10

Amperometry: Overview

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 2, 2026

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research
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Published on: April 18, 2013

Advancing membrane electrodes and optical ion sensors.

Eric Bakker1, Gastón Crespo, Ewa Grygolowicz-Pawlak

  • 1Department of Inorganic, Analytical and Applied Chemistry, University of Geneva. eric.bakker@unige.ch

Chimia
|May 3, 2011
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Summary

Recent advances in membrane electrode theory, driven by optical ion sensors, have enabled ultra-trace detection limits and dynamic electrochemistry principles for potentiometric sensors.

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Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research
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Published on: February 23, 2017

Area of Science:

  • Electrochemistry
  • Materials Science
  • Sensor Technology

Background:

  • Potentiometric sensors were widely adopted in clinical labs during the 1970s.
  • The field of membrane electrodes was historically empirical until recent theoretical and materials advancements.
  • Optical ion sensors have recently spurred significant innovation in potentiometric sensor development.

Purpose of the Study:

  • To summarize key progress in membrane electrode technology over the past two decades.
  • To highlight the influence of optical ion sensor theory on potentiometric sensors.
  • To discuss the impact of dynamic electrochemistry principles on sensor methodologies.

Main Methods:

  • Review of theoretical understanding in membrane electrode development.
  • Application of modern materials science approaches.
  • Integration of dynamic electrochemistry principles.

Main Results:

  • Achieved ultra-trace detection limits in potentiometric membrane electrodes.
  • Developed new methodologies based on zero-current ion fluxes and transport processes.
  • Transformed the field from empirical to a scientifically understood domain.

Conclusions:

  • Theoretical and materials advancements have revolutionized potentiometric membrane electrodes.
  • Dynamic electrochemistry principles have significantly expanded sensor capabilities.
  • Developments in potentiometric sensors are now influencing the field of optical sensors.