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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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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...
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Electrochemical Systems01:24

Electrochemical Systems

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Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution,...
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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.
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Electrodes: Overview01:17

Electrodes: Overview

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 Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
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The Electrical Double Layer01:30

The Electrical Double Layer

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In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
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Updated: Mar 5, 2026

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research
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New Solid-State Contact for lon-Selective Liquid Membrane Electrodes.

Lucas F J Dürselen, Ursula Oesterle, Susanna Schuppisser

    Chimia
    |March 26, 2017
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    Summary
    This summary is machine-generated.

    A novel solid-state contact for ion-selective electrodes was developed using solvent polymeric membranes. This innovation offers comparable performance to traditional electrodes without interference from common gases.

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    Area of Science:

    • Electrochemistry
    • Materials Science
    • Analytical Chemistry

    Background:

    • Conventional ion-selective electrodes (ISEs) often rely on liquid internal filling solutions.
    • These liquid junctions can be prone to leakage, contamination, and limited operational stability.
    • Developing robust solid-state alternatives is crucial for advancing ISE technology.

    Purpose of the Study:

    • To introduce a new solid-state contact for ion-selective electrodes (ISEs).
    • To evaluate the electrochemical performance of these novel solid-state ISEs.
    • To assess potential interference from dissolved gases.

    Main Methods:

    • Fabrication of solid-state contacts using solvent polymeric membranes.
    • Electrochemical characterization of the developed ISEs.
    • Testing for interference from oxygen, nitrogen, and carbon dioxide.

    Main Results:

    • The novel solid-state contacts demonstrate electrochemical behavior comparable to conventional ISEs with liquid junctions.
    • The electrodes maintain stable performance when in contact with an internal filling solution.
    • No significant interference was observed from oxygen, nitrogen, or carbon dioxide.

    Conclusions:

    • The developed solvent polymeric membrane-based solid-state contact is a viable alternative for ISEs.
    • This technology offers improved stability and reduced interference compared to traditional designs.
    • The solid-state ISEs are suitable for applications where gas interference is a concern.