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Related Concept Videos

Voltammetric Techniques: Cyclic Voltammetry01:10

Voltammetric Techniques: Cyclic Voltammetry

Cyclic voltammetry (CV) is an electrochemical technique used to investigate the redox properties of a chemical species. It involves measuring the current response of an electrochemical cell as a function of the applied potential. The setup for cyclic voltammetry typically consists of a working electrode, a reference electrode, and a counter electrode—all immersed in an electrolyte solution. The working electrode is where the redox reaction of interest occurs, while the reference electrode...
Voltammetric Techniques: Linear-Scan (E vs Time)01:12

Voltammetric Techniques: Linear-Scan (E vs Time)

Polarography is a classical voltammetric technique used to analyze electrochemical reactions. This method applies a linear potential sweep to a dropping mercury electrode (DME), and the resulting current is measured. A dropping mercury electrode is commonly used as the working electrode in polarography. It consists of a capillary tube filled with mercury, where the tiny droplet forms at the tip. This droplet continuously drops from the capillary, creating a new electrode surface for each...
Voltammetric Techniques: Pulse Voltammetry01:17

Voltammetric Techniques: Pulse Voltammetry

Differential-pulse voltammetry (DPV) is a type of voltammetry that involves applying a series of voltage pulses to an electrochemical cell while measuring the resulting current. In DPV, the differential pulse or small potential pulses are superimposed on a linear potential sweep. The magnitude of these pulses is typically small, often in the millivolt range. Each voltage pulse lasts a short duration, usually in the order of a few milliseconds, and is applied at regular intervals along the...
Voltammetry: Overview01:20

Voltammetry: Overview

Voltammetry is an electroanalytical technique in which the current flowing through an electrochemical cell is measured as a function of applied potential, typically under conditions of concentration polarization. The technique provides valuable information about redox-active species, and the current response is plotted as a voltammogram.
A voltammetric cell uses three electrodes: a working electrode, a reference electrode, and an auxiliary electrode. The redox reactions occur in the working...
Controlled-Current Coulometry: Overview01:27

Controlled-Current Coulometry: Overview

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...
Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

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 ensures...

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Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
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Electrode calibration with a microfluidic flow cell for fast-scan cyclic voltammetry.

Elly Sinkala1, James E McCutcheon, Matthew J Schuck

  • 1Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA.

Lab on a Chip
|April 24, 2012
PubMed
Summary
This summary is machine-generated.

A new microfluidic flow cell (μFC) simplifies electrode calibration for fast-scan cyclic voltammetry (FSCV). This device enables rapid, stable, and linear calibrations, improving neurotransmitter measurements in neuroscience research.

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Last Updated: May 23, 2026

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Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope (AFM-SECM)

Published on: February 10, 2021

Area of Science:

  • Analytical Electrochemistry
  • Neuroscience
  • Bioanalytical Chemistry

Background:

  • Fast-scan cyclic voltammetry (FSCV) is crucial for measuring neurotransmitters like dopamine in vivo.
  • Accurate electrode calibration is essential for quantifying analyte concentrations from FSCV signals.
  • Current calibration methods are often complex, requiring multiple components and reducing experimental efficiency.

Purpose of the Study:

  • To develop a simplified microfluidic flow cell (μFC) for efficient FSCV electrode calibration.
  • To improve the speed, stability, and linearity of electrode calibrations.
  • To demonstrate the utility of the μFC for in vitro and in vivo neurotransmitter measurements.

Main Methods:

  • A microfluidic Y-channel flow cell was designed to rapidly switch between buffer and analyte solutions.
  • The μFC was used to calibrate FSCV electrodes with dopamine solutions.
  • Calibrated electrodes were employed in FSCV recordings from rats during a food reward task.

Main Results:

  • The μFC enabled faster electrode calibration rise times and more stable peak current values.
  • Linear calibrations were achieved over a range of dopamine concentrations.
  • The μFC reduced the need for external electrical components, simplifying the calibration setup.
  • Dopamine concentrations were successfully quantified in vivo using μFC-calibrated electrodes.

Conclusions:

  • The developed microfluidic flow cell offers a simple and rapid method for FSCV electrode calibration.
  • This approach enhances the accuracy and efficiency of neurotransmitter quantification in electrochemical studies.
  • The μFC is a versatile tool applicable to both in vitro and in vivo FSCV experiments.