Versatile computer-based instrumentation for the application of three-dimensional voltammetry

doi:10.1016/0097-8485(95)00053-4

Computers & Chemistry

Volume 20, Issue 2, June 1996, Pages 209-218

https://doi.org/10.1016/0097-8485(95)00053-4 Get rights and content

Abstract

A versatile and inexpensive computer-based instrument for the application of 3-D voltammetry has been developed. The computerized system is easily interfaced to most potentiostats and allows for automated control, multi-function data acquisition, digital transformation of data and complex analysis. An evaluation of system performance as well as a few selected examples illustrating the general advantages of 3-D voltammetry are presented.

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Three-dimensional voltammetry: Use of chronoamperometric E-t-i data to achieve second-order advantage
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It is well known that the resolution between two overlapping voltammetric processes depends largely upon the half-wave potential (E1/2) values, the concentration ratios and the kinetics of the electron transfer [21]. Thus, for example, if two overlapping processes are kinetically different in the context of the electron transfer being the rate determining step, then the multi-time-domain electrochemical measurements could provide a useful way of discriminating against one of the processes, as long as measurements were made at longer time domains [22]. The work presented here aimed at the evaluation of E-t-i data in association with second-order calibration techniques in the development of electroanalytical methods.
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Although many efforts have been devoted to minimise or modelize this phenomenon [14–21], it still constitutes a serious drawback in the study of metal complexation. In the present work we revisit the methodology of three-dimensional voltammetry, consisting on the measurement of currents vs. potential vs. time by means of consecutive chronoamperograms at increasing potential steps [22–26]. In previous studies such methodology had been mostly applied for qualitative purposes.
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^∗: Present address: CSIRO Division of Minerals, P.O. Box 124, Port Melbourne, Victoria 3207, Australia.

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Versatile computer-based instrumentation for the application of three-dimensional voltammetry

Abstract

J. Electroanal. Chem. Interfacial Electrochem.

J. Electroanal. Chem. Interfacial Electrochem.

Anal. Chim. Acta.

Anal. Chim. Acta.

J. Electroanal. Chem. Interfacial Electrochem.

J. Electroanal. Chem. Interfacial Electrochem.

Anal. Chim. Acta

Anal. Chim. Acta

J. Electroanal. Chem. Interfacial Electrochem.

J. Electroanal. Chem. Interfacial Electrochem.

J. Electroanal. Chem. Interfacial Electrochem.

Anal. Chem.

Am. Lab.

Anal. Chem.