https://doi.org/10.1351/goldbook.09135
Linear scan voltammetry with slow scan rate in which a dropping mercury electrode is used as the working electrode. See figure.
Notes:
- This is the oldest variant of polarographic techniques, introduced by Jaroslav Heyrovský (1890–1967).
- Usually the drop time is between 1 and \(\pu{5 s}\) and the pseudo-steady-state wave-shaped dependence on potential is called a polarogram. If the limiting current is controlled by diffusion, it is expressed by the Ilkovič equation.
- If the whole scan is performed on a single growing drop, the technique should be called single drop scan voltammetry. The term polarography in this context is discouraged.
Electric current as a function of applied potential for DC polarography, showing oscillations of current as the dropping mercury electrode grows and is detached.