Redox potential: a value, not a state

The standard

A measured redox voltage states the reference electrode, temperature and moment of the measurement and is comparable only with these data. Without them a millivolt figure cannot be placed.

Criteria

  • The value is referred to a reference electrode
  • Temperature and pH of the measurement are stated
  • It holds for the moment of measurement
  • It is measured, not estimated from the sulfur content

Distinction

Redox potential ≠ redox balance: the potential is the numerical value, the balance is the state behind it. Redox potential ≠ reduction: reduction is one direction, a measured redox voltage captures the whole state.