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Key terms: cod sample mbox water cr oxidizing nh mg frac oxygen demand added compounds fas excess amount measurements volume bod ammonia determination potassium dichromate solution sulfate reagent reduced indicator reaction matter oxidizing agent inorganic formula demanda interference rightarrow substances wastewater concentration equation chemical oxygen demand blank sample nitrification assume all water sample permanganate water quality original sample biochemical oxygen demand ammonia into nitrate compound in the sample excess potassium dichromate Search external links cited by footnotes on Wikipedia page Chemical oxygen demand: |
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