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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

996
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...
996
Potentiometry: Overview01:06

Potentiometry: Overview

3.1K
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...
3.1K
Potentiometric Titration: Overview01:31

Potentiometric Titration: Overview

2.8K
Potentiometric titration is a quantitative analytical technique that determines the concentration of an analyte by measuring the potential difference between the two electrodes in the solution. The endpoint of a potentiometric titration is the point at which there is a significant change in the potential difference. It occurs when the stoichiometric reaction between the analyte and the titrant is complete. The endpoint is usually determined graphically by plotting the measured potential...
2.8K
Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

381
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...
381
Potentiometry: Types of Electrodes01:19

Potentiometry: Types of Electrodes

1.1K
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...
1.1K

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The Use of a &#946;-lactamase-based Conductimetric Biosensor Assay to Detect Biomolecular Interactions
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Recent Advances in Potentiometric Biosensing.

Nicole L Walker1, Anastasiya B Roshkolaeva2, Andrei I Chapoval2

  • 1Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.

Current Opinion in Electrochemistry
|May 31, 2021
PubMed
Summary
This summary is machine-generated.

Recent advances in potentiometric biosensors (2018-2020) highlight new trends. These include nanomaterials and miniaturized devices for diverse applications in health, safety, and industry.

Keywords:
Biofuel cellsBiosensorsField effect transistorsFlexible sensorsPotentiometry

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Area of Science:

  • Biosensors
  • Electrochemistry
  • Nanotechnology

Background:

  • Potentiometric biosensors are versatile analytical tools with applications spanning industry, security, environmental monitoring, and healthcare.
  • Recent developments have focused on enhancing their performance and expanding their utility.

Purpose of the Study:

  • To provide an overview of potentiometric biosensor types for beginners.
  • To summarize recent advances and trends in the field (2018-2020) for experts.

Main Methods:

  • Review of recent scientific literature (2018-2020) on potentiometric biosensors.
  • Focus on emerging trends and technological integrations.

Main Results:

  • Incorporation of nanomaterials, graphene, and novel immobilization techniques are key trends.
  • Development of miniaturized, flexible, and self-powered devices is a significant focus.

Conclusions:

  • Potentiometric biosensors are evolving towards more portable and integrated systems.
  • These advancements facilitate in-field and at-home applications across various sectors.