Iyo analyzer inoshandura otomatiki nzira yakajairika ye dichromate oxidation. Nguva nenguva inodhonza sampuro yemvura, inowedzera huwandu hwakakodzera hwe potassium dichromate (K₂Cr₂O₇) oxidant uye concentrated sulfuric acid (H₂SO₄) nesilver sulfate (Ag₂SO₄) se catalyst, uye inopisa musanganiswa kuti ukurumidze oxidation. Mushure mekugaya, dichromate yasara inoyerwa kuburikidza ne colorimetry kana potentiometric titration. Chishandiso ichi chinoverenga huwandu hweCOD zvichibva pakushandiswa kwe oxidant. Mamodheru epamusoro anobatanidza reactors dzekugaya, masisitimu ekutonhodza, uye mamodule ekubata marara kuti zvive zvakachengeteka uye zvakarurama.