The Potential Developed When A Bright Platinum Electrode Is Immersed In A Solution Containing An Ionic Species In Two Interconvertible Oxidation (valency) States. The Potential Is Dependent Upon The Ratio Of The Concentrations Of The Two Oxidation States, E.g., Iron Ii And Iron Iii Ions; 4-dihydroxybenzene (hydroquinone) And 1,4-benzoquinone (p-benzoquinone); Vat Dye And Leuco Vat Dye. Note: The Standard Redox Potential, E, Is That Developed When The Concentrations Of The Two Oxidation States Are Equal To Each Other, And In Vat Dye Systems Indicates The Difficulty With Which The Vat Dye (the Oxidized State) Can Be Reduced.
The electrical potential associated with the oxidation or reduction of a substance, such as an element or molecule.
Electrical potential indicating the relative activity of oxidised and reduced species. The redox potential of an environmental matrix is a measure of the extent to which oxidising species are present to act as terminal electron acceptors in respiration.
See oxidation-reduction potential.
A measure of the tendency of a system to donate or accept electrons, which is governed by the nature and proportions of the oxidizing and reducing substances contained in the system.
The potential of a reversible oxidation-reduction electrode measured with respect to a reference electrode, corrected to the hydrogen electrode, in a given electrolyte.
The potential developed by a metallic electrode when placed in a solution containing a species in two different oxidation states.
A measurement of the state of oxidation of a system.
The abbreviation for Red uction- Ox idation Potential. It is a measurement of the oxidiser's (e.g. chlorine) ability to oxidise contaminants versus the contaminants' (e.g. algae) ability to reduce the oxidiser. It is an indication of the level of free available oxidiser in the water. ORP is generally used with automated dosage systems and can give a fair idea of the sanitation of the water. It is not a measure of the total or available chlorine. Sometimes called ORP.