Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand (COD) method for NPDES reporting in the world.
COD Digestion Vials, High Range, pk/25 | Hach USA – Overview Hach's News wholesales certified 10mL hach cod vials exporter factory Nov 22, EPA VOA vials ...
Buy it with. Hach 2125925 COD Digestion Vial, High Range (Pack of 25). +. Hach 2105569 DPD Free Chlorine Reagent Powder Pillows, 10 mL, (Pack of 100.