METHOD OF MEASURING CHEMICAL OXYGEN DEMAND (COD) IN SEAWATER
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United States of America
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Apr 10, 2025
app pub date -
Oct 4, 2023
filing date -
Oct 4, 2023
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Abstract
A method of measuring chemical oxygen demand (COD) in seawater including dialyzing the seawater including chloride ions and at least one organic compound with an electrodialysis unit to form a processed seawater having at least 25% less chloride ions than the seawater; mixing the processed seawater with an oxidizing agent to oxidize the at least one organic compound and heating to 100-200° C. for 1-5 hours to form a digested solution. The method further includes cooling the digested solution and adding an indicator to form a titration solution, and further performing a colorimetric titration on the titration solution with a reducing agent so as to reduce any excess of the oxidizing agent and reach an equivalence point based on the indicator. The COD in the seawater is calculated based on an amount of reducing agent used in the colorimetric titration.
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