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For the COD test of sewage, organic matter is oxidised by K2Cr207 in the presence of
For the COD test of sewage, organic matter is oxidised by K2Cr207 in the presence of
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concentrated sulfuric acid
The COD test uses potassium dichromate (K2Cr2O7) in presence of concentrated sulfuric acid (H2SO4) solution that oxidizes both organic (predominate) and inorganic substances in a waste water sample.