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.