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Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen Mercury-based COD vials need appropriate environmental disposal.

Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand (COD) method for NPDES reporting in the world.

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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Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand (COD) method for NPDES reporting in the world.

Hach's COD Digestion Vials (High Range) are used for determination of high range Chemical Oxygen Demand (COD) by the Reactor Digestion method.

Hach 2125825 COD Digestion Vials, Low Range, (Pack of 25): Amazon.com: Chemical Oxygen Demand (COD): US EPA approved for wastewater analysis using Hach ...

(OR) Hach Low Range COD Vials 3-150 mg/L, 150/pk, 2125815. Price: $272.00 ... IMPORTANT NOTICE: Hach has implemented a 12% surcharge on all their ...