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Jan 20, 2017 A chemical oxygen demand (COD) test is used to measure the amount of organic compounds in a water sample. It measures the capacity of water ...
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2.0 mL of deionized water to a low range COD vial. Before testing, zero the instrument using a 16 mm vial and the 16 mm adapter. See AQ4000 manual for.
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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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