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Related Concept Videos

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...
Voltammograms: Overview01:16

Voltammograms: Overview

Voltammograms are current plots as a function of applied potential, offering insights into electrochemical systems. The shape of a voltammogram depends on how the current is measured and whether convection (heat transfer by fluid movement) is present or absent.
Shapes of Voltammograms
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...
Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...

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Related Experiment Video

Updated: Jun 28, 2026

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes
08:32

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes

Published on: June 30, 2019

Derivative hydrodynamic-modulation voltammetry.

J Wang1

  • 1Department of Chemistry, New Mexico State University, Las Cruces, NM 88003, U.S.A.

Talanta
|October 1, 1982
PubMed
Summary
This summary is machine-generated.

This study introduces derivative hydrodynamic-modulation voltammetry to enhance analytical resolution for mixtures. The technique transforms current-potential waves into convenient peak-shaped curves for sensitive electrochemical analysis.

More Related Videos

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
08:41

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Published on: September 7, 2018

Related Experiment Videos

Last Updated: Jun 28, 2026

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes
08:32

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes

Published on: June 30, 2019

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
08:41

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Published on: September 7, 2018

Area of Science:

  • Electroanalytical Chemistry
  • Analytical Chemistry
  • Physical Chemistry

Background:

  • Improving resolution in electrochemical analysis of mixtures is crucial.
  • Traditional voltammetric methods can face challenges with overlapping signals.
  • Solid electrodes are commonly used in sensitive analytical techniques.

Purpose of the Study:

  • To develop a novel technique for enhanced resolution in sensitive analyses of mixtures.
  • To transform current-potential waves into more manageable peak-shaped curves.
  • To evaluate the method's effectiveness at the micromolar concentration level.

Main Methods:

  • Utilizing derivative hydrodynamic-modulation voltammetry.
  • Applying simple data treatment to transform voltammetric waves.
  • Employing stopped-rotation and stopped-flow voltammetry.
  • Plotting the rate of change in hydrodynamic-modulation current against potential.

Main Results:

  • Successfully transformed current-potential waves into peak-shaped curves.
  • Demonstrated improved resolution for analyzing mixtures.
  • Evaluated single and multiple peak systems at micromolar concentrations.
  • Validated the method with test compounds like dopamine and ascorbic acid.

Conclusions:

  • Derivative hydrodynamic-modulation voltammetry offers a simple yet effective method for improving analytical resolution.
  • The technique facilitates easier data processing for complex mixtures.
  • The method is suitable for on-line computerization and sensitive electrochemical analyses.