Imfuno yeoksijini yekhemikhali, ekwabizwa ngokuba kukusetyenziswa kweoksijini yeekhemikhali, okanye i-COD ngokufutshane, isebenzisa ii-oxidants zemichiza (ezifana ne-potassium dichromate) ukuze i-oxidize kwaye ibolise izinto ezixutywe ne-oxidizable (ezifana ne-organic matter, nitrite, i-ferrous salts, sulfides, njl.) emanzini, kwaye ke ukusetyenziswa kwe-Oxygen yi-calcu...
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