Eh measurement in the food industry
Redox potential (Eh) of food matrices

The redox potential (E ) is expressed in relation to a reference, the normal hydrogen electrode, so it is noted E_h , and its units are expressed in mV or V.

The measurement involves two half-stacks, one of which must implement the reference pair H⁺/H₂ , and the other the system whose potential is to be measured.

The two half-batteries are, in fact, each made up of a solute and an electrode, the solutes are linked together by a salt bridge that allows them to exchange ions, and the electrodes are linked together by an electrical circuit on which a voltmeter is placed.