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Related Concept Videos

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...
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...
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...
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...
Electrodeposition01:08

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...

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

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Published on: June 30, 2019

Stripping voltammetry with collection at a rotating ring-disk electrode.

D C Johnson1, R E Allen

  • 1Department of Chemistry, Iowa State University, Ames, Iowa 50010, USA.

Talanta
|March 1, 1973
PubMed
Summary
This summary is machine-generated.

A novel electroanalytical method, stripping voltammetry with collection, offers improved detection limits and faster analysis times. This technique utilizes a rotating ring-disk electrode for enhanced performance in trace metal determination.

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Area of Science:

  • Electrochemistry
  • Analytical Chemistry

Background:

  • Traditional voltammetric stripping methods at single electrodes have limitations in sensitivity and analysis time.
  • Development of advanced electroanalytical techniques is crucial for sensitive trace element detection.

Purpose of the Study:

  • To introduce and describe a new electroanalytical technique: stripping voltammetry with collection.
  • To highlight the advantages of this new method over traditional single-electrode voltammetric stripping.

Main Methods:

  • The technique employs a rotating ring-disk electrode.
  • It involves a deposition step followed by a stripping step.
  • The method was demonstrated for silver ion (Ag+) determination.

Main Results:

  • Stripping voltammetry with collection achieves a lower limit of detection compared to traditional methods.
  • The deposition period required before stripping is shorter, leading to faster analysis.
  • The technique successfully determined 10(-10)M Ag+ in 0.1 M H2SO4 using a glassy carbon disk and platinum ring electrode.

Conclusions:

  • Stripping voltammetry with collection is a significant advancement in electroanalytical chemistry.
  • The technique offers enhanced sensitivity and efficiency for trace metal analysis.
  • This method provides a valuable tool for sensitive detection of ions like Ag+.