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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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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COD testing is a good better indicator of organic pollutants in Water analysis Material: Borosilicate 3.3 Glass Melting point: -7℃ Certificate: ISO9001.
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