Hach 2125825 COD Digestion Vials, Low Range, (Pack of 25): Amazon.com: Hach 2105669 DPD Total Chlorine Reagent Powder Pillows, 10 mL, (Pack of 100.
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Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand (COD) method for NPDES reporting in the world.
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CHEMetrics, Inc., manufactures a quality, cost-effective line of reagent vials for performing Chemical Oxygen Demand (COD) analysis. Both USEPA-Approved and
