What does COD stand for?

Study for the Laboratory Supervisor Test. Use flashcards and multiple choice questions with hints and explanations. Prepare effectively for your exam!

Multiple Choice

What does COD stand for?

Explanation:
Chemical Oxygen Demand measures the oxygen equivalent of the organic matter in a water sample that can be oxidized chemically. In the COD test, a strong oxidant (usually potassium dichromate) is used under acidic conditions and heated, and the amount of oxidant consumed corresponds to the amount of oxygen that would be required to oxidize the organics. This gives a quick estimate of the pollution load, expressed as mg/L of oxygen. It’s the best answer because it reflects the standard term used in water quality analysis, and it explains how the measurement relates to oxygen demand. Other phrases don’t match the established terminology used in labs, since they aren’t recognized terms for this test.

Chemical Oxygen Demand measures the oxygen equivalent of the organic matter in a water sample that can be oxidized chemically. In the COD test, a strong oxidant (usually potassium dichromate) is used under acidic conditions and heated, and the amount of oxidant consumed corresponds to the amount of oxygen that would be required to oxidize the organics. This gives a quick estimate of the pollution load, expressed as mg/L of oxygen. It’s the best answer because it reflects the standard term used in water quality analysis, and it explains how the measurement relates to oxygen demand. Other phrases don’t match the established terminology used in labs, since they aren’t recognized terms for this test.

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