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Related Concept Videos

Amperometry: Overview01:10

Amperometry: Overview

1.2K
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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Patch Clamp01:18

Patch Clamp

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Many fundamental cell functions such as muscle contraction and nerve transmission rely on the electrical signals produced by the movement of positively and negatively charged ions across the cell membrane. One competent method to record current flowing across the whole cell or single ion channel is the patch-clamp technique.
In this method, a glass micropipette containing electrolyte solution is tightly sealed against a small portion of the cell membrane. As a result, a patch of the cell...
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Related Experiment Video

Updated: Nov 29, 2025

Single Cell Measurement of Dopamine Release with Simultaneous Voltage-clamp and Amperometry
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Amperometry in Single Cells and Tissue.

Damien J Keating1

  • 1Flinders Health and Medical Research Institute, Flinders University, Adelaide, Australia. Damien.Keating@flinders.edu.au.

Methods in Molecular Biology (Clifton, N.J.)
|November 22, 2020
PubMed
Summary
This summary is machine-generated.

Measuring single exocytosis events is challenging due to their small scale. Carbon-fiber amperometry offers a noninvasive method to study real-time molecule release from cells and tissues.

Keywords:
AdrenalineAmperometryCatecholaminesChromaffin cellsEnterochromaffin cellsExocytosisNoradrenalineSerotonin

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Area of Science:

  • Cell biology
  • Neuroscience
  • Endocrinology

Background:

  • Exocytosis is a crucial cellular process for releasing signaling molecules like neurotransmitters and hormones.
  • The small scale of individual exocytosis events makes real-time kinetic measurements difficult.

Purpose of the Study:

  • To describe the application of carbon-fiber amperometry for measuring single exocytosis events.
  • To detail data analysis and physiological interpretation of these measurements.

Main Methods:

  • Utilizing carbon-fiber amperometry, a noninvasive technique.
  • Performing measurements on both single cells and live tissue preparations.

Main Results:

  • Demonstration of real-time kinetic analysis of exocytosis at the single-vesicle level.
  • Successful application in both cellular and tissue contexts.

Conclusions:

  • Carbon-fiber amperometry is a valuable tool for studying the kinetics of exocytosis.
  • This technique allows for detailed physiological interpretation of molecular release events.