Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand (COD) method for NPDES reporting in the world.
Contain premeasured reagents for accurate, economical determination of COD Shop CHEMetrics™ COD Reagent Vials at Fishersci.com.
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The closed reflux methods (C and D) are more economical in the use of metallic salt reagents and generate smaller quantities of hazardous waste, but require
A COD test typically involves digestion of a water sample in a sealed vial with potassium dichromate and sulfuric acid at 150oC for 2 hours.
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The EPA does not allow a modification of the reagents used for reporting purposes. You must use all specified reagents in the COD vial.
Pre-filled with COD reagents, these digestion vials come in either EPA-approved or mercury-free versions for low-, standard-, and ultra-high-range analysis.
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