Adsorptive stripping voltammetry
Encyclopedia
Adsorpive stripping voltammetry is similar to anodic stripping voltammetry
and cathodic stripping voltammetry
except that the preconcentration step is not controlled by electrolysis
. The preconcentration step in adsorptive stripping voltammetry is accomplished by adsorption
on the working electrode
surface, or by reactions with chemically modified electrodes
Anodic stripping voltammetry
Anodic stripping voltammetry is a voltammetric method for quantitative determination of specific ionic species. The analyte of interest is electroplated on the working electrode during a deposition step, and oxidized from the electrode during the stripping step. The current is measured during the...
and cathodic stripping voltammetry
Cathodic stripping voltammetry
Cathodic stripping voltammetry is a voltammetric method for quantitative determination of specific ionic species. It is similar to the trace analysis method anodic stripping voltammetry, except that for the plating step, the potential is held at an oxidizing potential, and the oxidized species are...
except that the preconcentration step is not controlled by electrolysis
Electrolysis
In chemistry and manufacturing, electrolysis is a method of using a direct electric current to drive an otherwise non-spontaneous chemical reaction...
. The preconcentration step in adsorptive stripping voltammetry is accomplished by adsorption
Adsorption
Adsorption is the adhesion of atoms, ions, biomolecules or molecules of gas, liquid, or dissolved solids to a surface. This process creates a film of the adsorbate on the surface of the adsorbent. It differs from absorption, in which a fluid permeates or is dissolved by a liquid or solid...
on the working electrode
Working electrode
The working electrode is the electrode in an electrochemical system on which the reaction of interest is occurring. The working electrode is often used in conjunction with an auxiliary electrode, and a reference electrode in a three electrode system...
surface, or by reactions with chemically modified electrodes
External links
- http://www.iupac.org/publications/pac/1989/pdf/6101x0097.pdf
- http://www.prenhall.com/settle/chapters/ch37.pdf