염소(chlorine)와 같은 산화 항미생물제(antimicrobials)는 물을 처리하는 데 사용하는 일반적인 소독제이다. 테스트 스트립(Test strips), DPD kits, 색채계(colorimeters)는 현재 이러한 응용 프로그램에서 산화 항미생물제 에이전트의 상대적 소독 능력을 결정하는 가장 널리 사용되는 방법이다.
유감스럽게도 이 테스트 옵션은 물의 실제 화학물질이나 소독제 방법과 전혀 관계가 없을 것이라는 화학 반응과 화학 약품의 특정 세트를 종종 목표로 삼는다. 이 문서는 ORP 측정이 작동하는 방법과 ORP 기반 테스트 방법이 융통성 있고 수용액(aqueous solutions)에 산화 항미생물제 에이전트의 소독 능력을 결정하는 효과적인 대안 책이라는 이유를 설명한다.
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ORP Based Measurement of Oxidizing Disinfectants in Aqueous Solutions Test methods based on ORP as an alternate method for measuring the presence of oxidizing disinfectants in aqueous solutions.
By Richard James Spahl Quality Engineering Manager, Myron L Company
Oxidizing antimicrobials, such as chlorine, are common disinfectants used to treat water. Test strips, DPD kits and colorimeters are currently the most popular methods for determining the relative disinfecting power of oxidizing antimicrobial agents in these applications. Unfortunately, these testing options often target narrowly specific sets of chemicals and chemical reactions that may have little to do with the actual chemistry of your water or disinfectant method. This article explains how ORP measurement works and why an ORP based test method is a flexible and effective alternative for determining disinfectant power of oxidizing antimicrobial agents in aqueous solutions.
ORP Defined
ORP stands for Oxidation-Reduction Potential. An oxidation-reduction (REDOX) reaction is an electrochemical process during which electrons are passed between different chemicals. The terms oxidizer and oxidation are related but not exactly the same. Substances that acquire electrons are called oxidizers (also oxidants or oxidizing agents) however the process by which an oxidizer gains electrons is referred to as reduction. Conversely, chemicals that lose electrons are called reducers (also called reductants or reducing agents) but the process by which they give up those electrons is referred to as oxidation.
REDOX reactions are usually defined in terms of half-reactions. A reduction half-reaction is one where the oxidizer gains electrons and an oxidation half-reaction is one where the reducer loses electrons.
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