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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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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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COD Digestion Vials. Minimize handling of corrosive and toxic chemicals and eliminate pipetting hazardous reagents. 16 mm Test 'N Tube for Hach DR 6000™ and 

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