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がくてきさんようきゅうりょう 化学的酸素要求量
Noun
1. chemical oxygen demand; COD
Wikipedia definition
2. Chemical oxygen demandIn environmental chemistry, the chemical oxygen demand (COD) test is commonly used to indirectly measure the amount of organic compounds in water. Most applications of COD determine the amount of organic pollutants found in surface water or wastewater, making COD a useful measure of water quality. It is expressed in milligrams per liter, which indicates the mass of oxygen consumed per liter of solution. Older references may express the units as parts per million (ppm).
Read “Chemical oxygen demand” on English Wikipedia
Read “化学的酸素要求量” on Japanese Wikipedia
Read “Chemical oxygen demand” on DBpedia

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