Two Common Electroanalytical Techniques - Cyclic Voltammetry and Impedance Capacitance Data from Cyclic Voltammetry

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Steady state monitoring of electrochemical parameters in process control, for example, is recognized as very viable approach. An impedance detector can be used to monitor a property, perhaps at a set frequency. Cyclic voltammetry is much less practical for those applications, because of its non-steady state nature, but the method can be also incorporated in a general sensing scheme. In cyclic voltammetry the potential excursion is usually quite high, perhaps a volt or so, whereas in impedance, the excursion is small, maybe only ten millivolts. In many experimental situations the two methods can be combined. Often, some information, usually obtained from one method, is attempted to be obtained from the other method as well. This work compares the results obtained from the two methods.