COD Digestion Vials, Low Range, pk/25 For determination of low range Chemical Oxygen Demand (COD) by the Reactor Digestion method. US EPA approved for wastewater analysis using Hach Method 8000. Range: 3-150 mg/L COD. Pack of 25 vials EPA Approved Simpler and Safer Easy Disposal Industry: Aquaculture, Chemical, Clinical/Medical Lab, Drinking Water, Fertigation, Food & Beverage, Oil & Gas, Petroleum, Storm Water, Waste Water, Hospitality, Agriculture