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Oxidation-Reduction Potential (ORP) Criteria

A chemical measure used to assess the efficacy of disinfectants, quantifying their ability to oxidize microbial components, often measured relative to a standard like hydrogen peroxide.
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The statement of the theorem

Define the Oxidation-Reduction Potential (ORP) as the difference in electrical potential (ΔE\Delta E) between the disinfectant solution and a standard reference electrode (e.g., Ag/AgCl\text{Ag/AgCl}). The potential is measured in millivolts (mV) and quantifies the oxidizing capacity O\mathcal{O} of the solution: ORP=Esolution−Ereference=Eox−Ered\text{ORP} = E_{solution} - E_{reference} = E_{ox} - E_{red} where EoxE_{ox} is the potential of the oxidized species and EredE_{red} is the potential of the reduced species. Efficacy requires ORP>ORPmin\text{ORP} > \text{ORP}_{min} for effective microbial oxidation.