summit current

in polarography
https://doi.org/10.1351/goldbook.S06132
In ac
polarography
, differential pulse
polarography
, derivative
polarography
, square-wave
polarography
, and similar techniques, the maximum value of the component of the current that is associated with the presence of a substance B. Normally this component of the current is faradaic, and the maximum arises because the rate of variation (with
applied potential
) of the rate of the charge-transfer process passes through a maximum. Similar maxima arise when this component is non-faradaic (and when B is surface-active rather than electroactive). In a case known to be of the latter type, the term
apex current
is recommended as being more specific.
Source:
PAC, 1985, 57, 1491. (Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)) on page 1499 [Terms] [Paper]