Oxidation-Reduction Potential


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oxidation-reduction potential

[‚äk·sə′dā·shən ri′dək·shən pə‚ten·chəl]
(physical chemistry)

Oxidation-Reduction Potential

 

the electrode potential of an electrolytic system at equilibrium. At constant temperature, the oxidation-reduction potential is only dependent on the composition of the medium and is equal to the potential difference between a neutral electrode and a solution containing interconvertible, oxidized and reduced forms of a compound.

The simplest illustration of oxidation-reduction potential involves ferric oxide and ferrous oxide ions: Fe3+ ions capture electrons from the metal and convert into Fe2+ ions, which, in turn, are able to effect the reverse reaction; the potential at which the forward and reverse reactions kinetically balance each other is the oxidation-reduction potential. An increase in the oxidizing strength of the medium is accompanied by an increase in the oxidation-reduction potential. The values that are derived for oxidation-reduction potentials are used to solve various problems in electrochemistry, biochemistry, and analytical chemistry. These values, like the values for standard potential that are obtained from a hydrogen electrode, proceed from an arbitrary zero point.

References in periodicals archive ?
Lytle, "Measuring the oxidation-reduction potential of important oxidants in drinking water," Journal of the American Water Works Association, vol.
Assessment of oxidative stress in septic and obese patients using markers of oxidation-reduction potential," In Vivo, vol.
In addition, increases in plasma static oxidation-reduction potential (spot measurement, sORP) levels were closely related to increases in iTBI severity as assessed by the Abbreviated Injury Score (p=0.
Three lakes in Hoosier National Forest, Perry County, southern Indiana, were studied for diel changes in dissolved oxygen, temperature, pH, oxidation-reduction potential, salinity, specific conductance, and total dissolved solids during the fall of 2005.
In this category are biochemical oxygen demand (BOD); chemical oxygen demand (COD); oxidation-reduction potential (ORP); dissolved oxygen (DO); methylene blue active substances; organic carbon; total filterable, non-filterable and volatile residues; and gas analysis.
02), as well as between patients' oxidation-reduction potential levels and injury severity as assessed by the validated Injury Severity Score (ISS; p=0.
Water quality monitors that use electrolytic sensors for chemical characteristics such as conductivity, pH, oxidation-reduction potential, dissolved oxygen, and chlorides - as well as sensors for physical characteristics such as turbidity, color, temperature, and solar radiation - are furnished by The Foxboro Co.
Measurement of oxidation-reduction potential (commonly abbreviated to ORP or redox) affords an indication of the success of oxidation processes in sewage and industrial waste treatment units.
The ability of the acidic water to kill harmful bacteria is due to its high chlorine content, a very low pH, which slows most enzymatic activity, and its strong oxidation-reduction potential (ORP).
Researchers believe that the main indicator of the effectiveness of the solution is the oxidation-reduction potential.
Changes in analyte concentration over time, divided by the concentration of the conjugate analyte at time 0, strongly correlated with oxidation-reduction potentials.
Bass Becking LGM, Kaplan IR, Moore D (1960) Limits of the natural environment in terms of pH and oxidation-reduction potentials.

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