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Quantitative Determination Of Surface Excess By The Semiintegral Method, Susanne Dana, Mathew Jablonski, Mark Anderson
Quantitative Determination Of Surface Excess By The Semiintegral Method, Susanne Dana, Mathew Jablonski, Mark Anderson
Mark R. Anderson
In 1988 Bowling and McCreery reported that the semiintegral of voltammetric data provided an excellent method for the qualitative diagnosis of weak adsortpion of material upon an electrode. This report was important to electroanalytical chemistry because of the difficulty often encountered when trying to identify the presence of weakly adsorbed material and because of the impact that weak adsorption has upon voltammetric response. Many electrochemical analyses are dependent upon the evaluation of voltammetric wave shape, particularly kinetic analyses. Unlike strong adsorption, the presence of weakly adsorbed material does not dramatically and obviously perturb the shape of the voltammetric response; consequently, …
Application Of Square Wave Voltammetry For Electrochemical Detection In Gradient Elution Hplc, John Roush, Mark Anderson
Application Of Square Wave Voltammetry For Electrochemical Detection In Gradient Elution Hplc, John Roush, Mark Anderson
Mark R. Anderson
The utility of square-wave voltammetry with a conventionally sized indicator electrode for use in the detection of gradient elution HPLC applications is demonstrated. A redesigned electrochemical detector cell, based upon a type of wall-jet design, provides more efficient potential control and allows the voltammetric detection. The minimum detectable quantity and linear dynamic range for the new detector design were found to be 13pg and 5 orders of magnitude, respectively, comparable to other electrochemical detectors. In the separation of a test mixture containing hydroquinone. bromohydroquinone, catechol, resorcinol, and phenylhydroquinone baseline resolution of all five components is obtained in 12 minutes using …