Voltammetry and polarography analysis system
eDAQ
Common techniques are:
- Amperometry
Sometimes called chronoamperometry, or constant potential recording.
A fixed potential is held at the working electrode and the current flow monitored with time. Chart software is typically used to record results. With Chart you can also use the Computed Function Integral to integrate the signal over to perform coulometric recording.
- Differential Pulse Amperometry
A fixed potential is held at the working electrode for most of the time, except for voltage pulses which are applied at regular intervals. The current flow is monitored just prior to, and also during the pulse. The current flow measured immediately prior to the pulse is subtracted from the current measured during the pulse. These current differences versus time are plotted. This has the effect of removing 'baseline drift'. The EChem MultiPulse Amperometry technique is designed for this type of experiment.
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