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Related Concept Videos

Controlled-Current Coulometry: Overview01:27

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Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
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Controlled-Current Coulometry: Coulometric Titration01:18

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Coulometric titrations are a form of titrimetric analysis where the reagent is generated electrically, and its amount is evaluated based on current and generating time. The electron serves as the standard reagent. The procedure is similar to conventional titrations, such as endpoint detection.
The fundamental requirements for coulometric titrations are (1) 100% efficiency in the reagent-generating electrode reaction and (2) a stoichiometric and preferably rapid reaction between the generated...
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Design and Use of Multiplexed Chemostat Arrays
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Miniaturized Control of Acidity in Multiplexed Microreactors.

Divya Balakrishnan1, Janwa El Maiss1, Wouter Olthuis2

  • 1Luxembourg Institute of Science and Technology (LIST), 41 Rue du Brill, L-4422Belvaux, Luxembourg.

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|March 6, 2023
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Summary
This summary is machine-generated.

Researchers developed a microreactor device for precise electrochemical control of acidity in tiny volumes. This miniaturized system enhances speed and throughput for biopolymer assembly and combinatorial chemistry applications.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Biotechnology

Background:

  • Acidity control is crucial for biopolymer assembly and applications.
  • Miniaturization of chemical manipulation increases speed and combinatorial possibilities.
  • Electrochemical methods offer precise control over chemical environments.

Purpose of the Study:

  • To present a novel device for electrochemical control of acidity in miniaturized volumes.
  • To demonstrate the device's capability for independent pH control in multiplexed microreactors.
  • To explore the potential of this technology for combinatorial chemistry.

Main Methods:

  • Development of multiplexed microreactors with independent electrochemical control.
  • Utilizing redox proton exchange reactions to drive acidity changes.
  • Characterization of pH range, accuracy, stability, and reversibility.

Main Results:

  • Achieved independent electrochemical acidity control in ~2.5 nL volumes.
  • Demonstrated a wide pH range (3-7) with an accuracy of at least 0.4 pH units.
  • Maintained stable pH for extended periods and over numerous cycles (>100).

Conclusions:

  • The developed microreactor system offers precise, miniaturized, and multiplexed control of acidity.
  • This technology enables advanced pH- and acidity-controlled reactions for combinatorial chemistry.
  • The device has significant potential for accelerating biopolymer assembly and related applications.