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Describe how these two techniques : cyclic voltametric techniques and Normal pause voltametric techniques differ in their operations and measurements
Accepted Answer
Cyclic voltammetric techniques and normal pulse voltammetric techniques differ in their operations and measurements as follows:
Cyclic Voltammetry:
- Consists of linearly changing the potential of a working electrode immersed in an analyte solution and measuring the resulting current.
- The potential is scanned in a cyclic manner, typically between two predetermined limits.
- Provides information on the redox processes occurring at the electrode surface and the kinetics of these processes.
Normal Pulse Voltammetry:
- Involves applying a series of short potential pulses to the working electrode, with a rest period between each pulse.
- During the pulse, the current is measured, and during the rest period, the double layer capacitance is allowed to relax.
- Provides enhanced sensitivity and selectivity compared to cyclic voltammetry, as the charging current is minimized during the rest period.
- Allows for the study of fast electrode processes and the determination of kinetic parameters.
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