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The colorimeter or spectrophotometer is the device that is going to read the absorbance of the samples after digestion in order to correlate it to the COD
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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. There are further
Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand (COD) method for NPDES reporting in the.
COD measurement can experience interference from chloride ions. Frequently Asked Questions. Can COD be measured while the vial is still hot?
BOD (biochemical oxygen demand); COD (chemical oxygen demand) Two vials are then marked for the wastewater sample to make a duplicate run.
COD is a defined test; the extent of sample oxidation can be affected by digestion time, reagent strength, and sample COD concentration. COD often is used as a
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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. Why test for COD?
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